Alpha JX2 vs TOTO S5: Every Feature Compared

The Alpha JX2 is the better buy for most people: it gives you endless warm water, a stainless steel nozzle, bowl mist and a 3-year warranty for roughly $280 to $390 less than the TOTO S5. The S5 earns its higher price only if you want TOTO’s EWATER+ and PREMIST hygiene system, four user presets and a stronger warm air dryer.

I used to run an Alpha JX vs. TOTO C5 comparison, and both seats have since been replaced. I own the original Alpha JX, and I installed and tested the C5 extensively. I have not tested the JX2 or the S5. Everything about the new seats comes from Bidet King’s and TOTO’s spec sheets. Where I carry over a finding from my old JX or C5, I say so.

The biggest news is that TOTO finally fixed the C5’s weak spot. The S5 heats water on demand, so the warm-water gap that made the JX an easy win is closed. Meanwhile, the price gap between the two brands got wider.

Alpha JX2 vs. TOTO S5: Quick Summary Table

The JX2 wins on price, warranty and spray strength, while the S5 wins on dryer airflow, hygiene tech and presets. Both now heat water on demand and fit round and elongated toilets.

Feature	Alpha JX2	TOTO S5
Typical price	About $389	About $668 to $780
Water heating	Tankless, endless	Instantaneous, continuous
Nozzle hygiene	Stainless steel, bowl mist	EWATER+, PREMIST
Dryer	Adjustable warm air	95 to 140°F, 8.83 cfm
User presets	2	4
Warranty	3 years	1 year

Where Does Each Seat Win?

The JX2 wins on:

• Price. At around $389, it costs roughly half of what the S5 does.
• Warranty. You get 3 years from Alpha versus 1 year from TOTO.
• Spray strength. Alpha’s JX-class seats push noticeably more water than the S5’s 0.07 to 0.11 gal/min rating.
• Sittable lid. Alpha builds the lid to be used as a seat.

The S5 wins on:

• Drying. It has a published 8.83 cfm airflow and dryer temps up to 140°F. TOTO’s dryer also beat Alpha’s on the C5, which I’m carrying over from my own testing.
• Hygiene extras. EWATER+ sanitizes the wand and bowl, PREMIST wets the bowl, and CLEAN RESIN helps shed grime from the seat.
• Presets. Four household members can save their settings, compared with two on the JX2.

What Do Both Seats Have in Common?

On the basics, these two seats are closer than ever. Both include:

• On-demand warm water that won’t run cold mid-wash
• A rear wash and a front feminine wash
• A heated seat with adjustable temperature
• A warm air dryer
• A wireless remote
• A nightlight
• Slow-close hinges
• Versions for both round and elongated bowls

If all you need is a warm wash and a warm seat, either one delivers.

What Changed Since the JX vs. C5?

Both original seats have been retired. The JX became the JX2 and the C5 became the S5. The successors are more evenly matched on hardware, but they sit further apart on price.

In my Alpha JX vs. TOTO C5 comparison, the JX performed better and offered more for the money. TOTO has since chipped away at that lead.

Did the S5 Close the Warm-Water Gap?

Yes. TOTO lists an instantaneous heater on the S5 with continuous warm water from 95 to 104°F.

That matters because warm water was the C5’s biggest weakness. Its tank started running cool at about 40 seconds in my testing. If you took a longer wash, you felt it.

My original JX held its temperature for my whole 10-minute test. The JX2 keeps that tankless design, according to Bidet King. On paper, both new seats now heat on demand, so warm-water endurance stops being a reason to pick one over the other.

Alpha made its own key change as well. The JX2 swaps the original JX’s aluminum nozzle for stainless steel and adds a bowl mist feature, which closes some of the hygiene gap with TOTO.

Which Upgrades Help Explain the Wider Price Gap?

The S5 runs about $668 to $780, while the JX2 sits around $389. That gap is wider than it was between the JX and C5.

Several S5 upgrades help explain the higher price:

• The instantaneous heater replaces the C5’s tank.
• CLEAN RESIN is TOTO’s seat material, made to resist stains and buildup.
• A seamless seat has fewer crevices where grime collects.
• Four user presets are on the remote, which also sits in a docking station.
• EWATER+ and PREMIST carry over from the C5 tier.

Whether those extras are worth an extra $280 to $390 is the core question of this matchup.

Warm Water and Heaters

Neither seat should run out of warm water, because both heat it as it flows. That makes heater type a tie for 2026, which is a big shift from the last generation. If you’re new to how these systems work, I explain the tank, hybrid and tankless designs in my guide to how warm water bidets work.

Will Either Seat Run Out of Warm Water?

According to their spec sheets, no.

• Alpha JX2: Bidet King lists tankless, endless warm water.
• TOTO S5: TOTO lists an instantaneous heater with continuous warm water and a range of 95 to 104°F.

A tankless heater warms water the instant it passes through, so there’s no reservoir to drain. The trade-off is a higher momentary power draw while you wash, which I cover in the energy section below.

One caution applies to both seats. Very cold incoming water in winter makes any on-demand heater work harder. If your spray ever feels chilly, my guide to a bidet water too cold problem walks through the usual fixes.

What Can My Original JX and C5 Tests Tell Us?

My tests are a useful baseline, but they aren’t proof for the new seats.

• Original JX (carried over): It held a steady temperature for 10 minutes straight. The JX2 uses the same tankless approach, so I’d expect similar behavior. Even so, I haven’t measured it.
• C5 (does not carry over): It cooled at around 40 seconds because of its tank. The S5 drops that tank, so my C5 result doesn’t apply here.

In short, my JX finding likely carries forward to the JX2, while my C5 finding is retired along with the C5.

Cleansing Spray, Nozzle and Bowl Mist

Alpha leans toward a stronger spray and a simpler stainless nozzle. TOTO leans toward a gentler, low-flow spray backed by a full sanitizing system. Both pre-wet the bowl before you sit down.

How Do the Wash Settings and Nozzles Compare?

Spray strength. TOTO rates the S5 at 0.07 to 0.11 gal/min, which works out to about 0.26 to 0.42 liters per minute.

Alpha rates its JX Elite at up to about 0.8 to 1 L/min on the Rear+ setting. Alpha does not publish an exact flow figure for the JX2. That said, my original JX felt stronger than the C5, and the brand’s JX-class seats are built around that harder spray. If you like a forceful wash, Alpha is the safer bet. If you prefer a soft rinse, the S5’s range suits you.

Nozzle material. The JX2 uses a stainless steel nozzle, an upgrade from the aluminum one on my old JX. Stainless steel resists corrosion and wipes clean easily. TOTO pairs its wand with EWATER+ sanitizing instead of relying on material alone.

Wash modes. Both seats offer a rear wash and a front feminine wash. Both also let you adjust water pressure and nozzle position.

For upkeep tips on either nozzle, see my complete guide to cleaning a bidet.

What Is the Difference Between Bowl Mist and EWATER+?

These features do different jobs.

• Bowl mist (JX2) and PREMIST (S5): Each sprays the bowl before use so waste is less likely to stick. They’re the same idea under two brand names. On the C5, I found PREMIST kept the bowl noticeably cleaner, which I’m carrying over from my testing. The JX2’s version is new to Alpha’s mid-tier seat, and I haven’t used it.
• EWATER+ (S5 only): TOTO’s system sprays electrolyzed water on the wand and bowl after use to help limit bacteria and buildup between cleanings.

So bowl mist gives you the pre-wetting half of TOTO’s routine, while EWATER+ adds an after-use sanitizing step. If you want the most hands-off bowl care available, the S5 has it. You can compare more models with that kind of tech in my roundup of the best self cleaning bidets.

Dryer, Deodorizer and Heated Seat

TOTO keeps the edge on drying and odor control, while the heated seats are close on paper. The S5 publishes stronger dryer specs, and TOTO’s dryer was clearly better on the C5 I tested.

Is TOTO’s Dryer Still Worth Paying More For?

If you want to drop toilet paper entirely, it’s worth a serious look.

TOTO lists the S5 dryer at 95 to 140°F, with 3 settings and 8.83 cfm of airflow. Airflow is the number I care about most, because high heat alone gets uncomfortable fast. A stronger fan dries you faster at a comfortable temperature.

On the C5, TOTO’s dryer beat my original JX, and I’m carrying that over as a TOTO strength. Bidet King lists the JX2’s dryer with adjustable temperatures but no published airflow figure, so I can’t put a number on the gap. Owners of Alpha’s JX-class seats commonly finish up with a square or two of paper.

If drying ranks first for you, my list of the best bidets that have dryers covers stronger options.

Which Comfort and Odor Features Do You Get?

• Heated seat: The S5 runs from 82 to 97°F. The JX2 has an adjustable heated seat, according to Bidet King. Both are comfortable on a cold morning.
• Deodorizer: TOTO lists a deodorizer on the S5, and the C5 had one too. Bidet King’s JX2 spec list that I’m working from doesn’t mention one, so check the listing if odor control is a priority for you.
• Nightlight: Both seats have one. My original JX’s LED nightlight was bright and handy for late-night trips, and that carries over as a feature.

Remote, Presets and Shortcut Buttons

The S5 stores more user profiles, and the JX2 makes one-touch use easier. Both seats come with a wireless remote and a holder.

How Do the Remotes and Saved Settings Differ?

Alpha JX2:

• Backlit wireless remote with a wall mount
• 2 user presets
• EASY WASH and WASH & DRY shortcut buttons

TOTO S5:

• Wireless remote that sits in a docking station
• 4 user presets

TOTO’s remote was the fancier of the two on the C5, which I’m carrying over from my testing. Presets save your preferred settings, such as water temperature, pressure and nozzle position. A household of two is fine with the JX2. A family of four that wants individual settings is better served by the S5.

The JX2’s backlight helps at night, since you can find the right button without turning on the overhead light.

When Are EASY WASH and WASH & DRY Useful?

Both buttons pay off when someone doesn’t want to fiddle with settings.

• EASY WASH starts a wash with one push.
• WASH & DRY runs the wash, then the dryer, automatically.

These buttons are great for guests, kids and older relatives who aren’t comfortable with a bidet remote. I’d point anyone unfamiliar with bidets to the WASH & DRY button first.

One tip carried over from my original JX: if the seat ever acts up, hold Power Saving and Rear/Stop together for 5 seconds to reset it. Check the JX2 manual to see whether that combination still applies.

Design, Fit and Sizes

Both seats now come in round and elongated sizes. That’s a change from my last test, when the C5 I had was elongated only. If you have a one-piece toilet, check fitment carefully before you order.

Design-wise, the S5 uses a seamless seat, CLEAN RESIN and SoftClose hinges. The JX2 has a low-profile build, slow-close hinges, a sittable lid and a built-in LED nightlight. Both are DIY installs; my original JX took me well under an hour with basic tools. For full install details on the older model, see my Alpha JX review.

Will Either Seat Fit a Round or Elongated Toilet?

Yes, both come in both sizes.

Measure from the seat bolt holes to the front of the bowl:

• About 16.5 inches: round
• About 18.5 inches: elongated

Bidet King says the JX2 fits all two-piece toilets and most one-piece models. TOTO sells the S5 in both sizes as well. You’ll also want a grounded GFCI outlet within reach of the power cord for either seat.

What Should Owners of French Curve Toilets Check?

French curve one-piece toilets have a sloped back that blocks many bidet seats. The original JX was Alpha’s best fit for these toilets, and Bidet King lists specific JX2 results:

• San Raphael: fits about 70 percent of the time
• Santa Rosa: fits with a 3/4-inch overhang
• Glacier Bay N2420: good fit

TOTO’s S5 spec sheet I’m working from doesn’t list French curve results, so confirm with the retailer before you buy. If you own one of the toilets above, the JX2 has the documented track record.

Energy Use

Both seats heat water on demand, so neither keeps a tank warm around the clock. Beyond that, I won’t put a number on either seat’s monthly cost, because I haven’t measured the JX2 or the S5.

Does Tankless Heating Mean Lower Electricity Use?

Usually, yes, though the savings depend on how you use the seat.

A tankless heater draws a lot of power for the few seconds you’re washing, then goes quiet. A tank seat sips power all day to keep its water warm. For most households, on-demand heating wins over a full month.

The heated seat is the bigger drain, because it stays warm while nobody’s sitting on it. Both brands include an energy-saving mode that lowers seat heat during idle hours. Turn it on, and drop the seat temperature a notch in summer.

Which Power-Use Claims Can We Actually Verify?

Only a few, so be cautious with any precise monthly cost you see online.

• Measured by me: Alpha’s UX Pearl, a different seat, used about 1.8 to 2.0 watts at idle in Eco mode. That figure doesn’t transfer to the JX2.
• Published for the JX2: Some JX2 listings quote a peak draw of about 1,460 watts and an idle draw of 5 to 8 watts. Treat those as listing claims until you check the manual.
• Published for the S5: TOTO’s spec sheet I’m working from doesn’t give a monthly kWh figure.

On the information available, I’d call energy use a tie.

Price, Warranty and Support

The S5 costs roughly $280 to $390 more and carries a warranty one-third as long. That combination is the main reason the JX2 is my value pick.

How Much More Does the S5 Cost?

• Alpha JX2: about $389
• TOTO S5: about $668 to $780, depending on size and seller

Bidet prices moved up across the category in mid-2026, so treat these numbers as snapshots. Even after the increases, the S5 runs about 70 to 100 percent more than the JX2.

Owner ratings for both seats are solid, and the JX2 is a frequent value pick in reviews this year.

What Does Each Warranty Cover?

• Alpha JX2: 3 years
• TOTO S5: 1 year

TOTO’s warranty is one year across its Washlet line. Alpha’s longer coverage on the JX2 matches what I had on my original JX.

Support was another area where Alpha impressed me. When I had questions about my JX, Alpha’s chat support answered within seconds. That’s my experience with the older seat, and your results may vary, but it left me confident about the brand.

TOTO’s advantage is its name: it’s a long-established bidet maker with a big service network.

Which Should You Buy?

Most buyers should get the JX2. TOTO fans who want the full EWATER+ and PREMIST hygiene package should get the S5. Both appear on plenty of best bidet toilet seat lists, so your choice comes down to value versus extras.

Choose the JX2 for Value and a Longer Warranty

The JX2 suits:

• First-time bidet buyers on a sensible budget
• Couples who are fine with 2 user presets
• People who like a stronger spray
• Owners of French curve one-piece toilets, especially the models Bidet King lists
• Anyone who wants 3 years of warranty coverage

You still get endless warm water, a stainless nozzle, bowl mist, a heated seat, a dryer and a nightlight. For context on where it fits in Alpha’s lineup, see my Alpha bidets compared guide.

Choose the S5 for TOTO’s Hygiene Features and Deodorizer

The S5 suits:

• TOTO loyalists who already trust the brand
• Households of 3 or 4 that want separate presets
• Anyone who wants EWATER+ sanitizing on top of PREMIST
• People who want an air deodorizer
• Buyers who want to rely on the dryer alone and skip paper

If those extras matter to you and the price doesn’t, the S5 is a polished seat among TOTO bidet seats.

Why the JX2 Is My Value Pick

The Alpha JX2 is my value pick because it matches the TOTO S5 on warm water while costing far less and offering three times the warranty. The S5 closed the heater gap that hurt the C5, and that makes it a much better TOTO than the one I tested.

Even so, it’s hard to justify an extra $280 to $390 for a better dryer, EWATER+, a deodorizer and two more presets when the warranty drops to one year.

For most people, here’s how I’d decide:

• Pick the JX2 if you want strong, endless warm water and a 3-year warranty for around $389.
• Pick the S5 if TOTO’s sanitizing, odor control and four presets are worth roughly double the price to you.
• Before ordering either one, measure your bowl and confirm French curve fitment if you have a one-piece toilet.

Ready to buy? Bidet King sells every seat in this comparison. You can check current prices on the Alpha JX2 Bidet Toilet Seat here (affiliate link).