TOTO Washlet KS2 vs KS6: The Differences Explained

The TOTO Washlet KS6 adds EWATER+ wand sanitizing, PREMIST bowl misting, an automatic deodorizer, and a wireless remote with 4 user presets that the TOTO Washlet KS2 doesn't have. The Washlet KS2 costs less and comes in round as well as elongated, while the Washlet KS6 is elongated only.

Choose the Washlet KS2 if you have a round bowl or want TOTO's core warm water comfort at the lower price, and choose the Washlet KS6 if you want the full hygiene package and personalized settings for a household that shares one bathroom.

Why This Comparison Is Different From the Others

Most TOTO Washlet comparisons come down to one or two features. This one is the widest gap in the KS family, because the Washlet KS2 and Washlet KS6 sit at opposite ends of the same lineup.

The Washlet KS6 launched in summer 2025 as TOTO's replacement for the popular K300. The Washlet KS2 arrived a year later in the 2026 lineup, built as a more affordable entry point rather than a successor.

TOTO KS2 and TOTO KS6 at a Glance

The Washlet KS6 wins on hygiene technology and control, while the Washlet KS2 wins on price and bowl shape flexibility. Everything in the comfort column is a tie.

Model Overview and Where Each Fits in the Lineup

The Washlet KS2 (models SW2336 and SW2335) launched in TOTO's 2026 lineup alongside the Washlet KS5 and the Washlet S1. It sits in the middle of that trio, above the S1 and below the KS5.

The Washlet KS6 (model SW3946) came earlier and sits well above all three, closer in capability to TOTO's Washlet S2 and Washlet S5 than to the entry models.

What the Two Seats Actually Share

The overlap is genuinely large, and it covers most of what people use a bidet seat for day to day:

• Tankless, instantaneous water heating with unlimited warm water
• Front and rear washing with oscillating and pulsating spray
• Adjustable water temperature, pressure, and spray position
• Heated seat with adjustable temperature
• Warm air dryer with three temperature settings
• Built in night light
• CLEAN RESIN surfaces that resist dirt and grime
• SoftClose seat and lid
• Quick release docking station
• Auto energy saver mode
• WASHLET+ compatibility
• Cotton White finish

If your priority is simply warm water instead of paper, both seats deliver the same core experience.

Hygiene Technology: The Biggest Gap

This is where the extra $191 goes. The Washlet KS6 carries three automated hygiene features that the Washlet KS2 leaves out entirely.

EWATER+ Wand Sanitizing

Both seats rinse their own wand before and after every use. The Washlet KS6 goes further with TOTO's EWATER+ system, which sanitizes the wand using electrolyzed water rather than plain water.

PREMIST Bowl Misting

The Washlet KS6 mists the bowl with water immediately before each use, so waste is less likely to stick to the porcelain. The Washlet KS2 has no PREMIST function, which means slightly more manual bowl cleaning over time.

Automatic Deodorizer

The Washlet KS6 pulls air through a filter during use to neutralize odors at the source. The Washlet KS2 doesn't include a deodorizer at all, so this is a real day-to-day difference in a shared or windowless bathroom.

Controls: Remote Versus Arm Panel

The Washlet KS6 comes with an illuminated wireless remote that stores personalized settings for up to four people. It can sit on a counter or mount to the wall.

The Washlet KS2 puts its controls on a panel attached to the side of the seat, with no per-user memory. Everyone works from whatever settings were last used.

Spray Settings Compared

Spray is a tie. TOTO lists both seats with the same gentle aerated front and rear spray, oscillating and pulsating features, and adjustable spray position, water temperature, and water pressure.

Some retailer listings describe the Washlet KS6 as having more spray settings, but TOTO's own specifications give both models the same wash functions.

Installation and Compatibility

This is the practical difference to settle before anything else. The Washlet KS6 is built for elongated bowls only, while the Washlet KS2 comes in both elongated and round.

If your toilet has a round bowl, the Washlet KS2 is your only option of the two, and the comparison ends there.

Elongated bowls measure about 18.5 inches from the mounting holes to the front of the bowl, and round bowls measure about 16.5 inches. Measure before ordering, because the wrong bowl shape is the most common reason either seat gets returned.

Both models install the same way and need a nearby grounded outlet, ideally GFCI protected, plus a standard water supply connection. Most people can do it in under an hour with a screwdriver.

Price and Value Breakdown

Premier Bidets currently prices the Washlet KS2 at $399 in either bowl shape and the Washlet KS6 at $590. That $191 gap is the widest in this part of TOTO's lineup.

What the extra money buys is automation: a wand that sanitizes itself with electrolyzed water, a bowl that stays cleaner on its own, active odor control, and settings each person can save.

Is the Upgrade Worth It?

For a primary bathroom used daily by more than one person, the hygiene features and user presets tend to earn their keep. For a guest bathroom, a rental, or a single user, the Washlet KS2 covers the same fundamentals for meaningfully less.

Who Should Buy the TOTO Washlet KS2

The Washlet KS2 is the right pick if you have a round toilet, if you're outfitting more than one bathroom and want to keep the total down, or if you simply don't need automated bowl and wand cleaning. It's also a sensible first bidet seat for anyone who wants to feel the difference from warm water cleansing without stretching the budget.

Who Should Buy the TOTO Washlet KS6

The Washlet KS6 makes the most sense for an elongated primary bathroom in a household where hygiene automation and personalized settings matter. If less bowl scrubbing, an actively sanitized wand, and odor control sound worth the price difference, this is the stronger seat.

Final Verdict: Making the Right Choice for Your Home

Choose the Washlet KS2 for a round bowl, a secondary bathroom, or the best price on TOTO's core comfort features. Choose the Washlet KS6 for an elongated bowl when you want EWATER+, PREMIST, a deodorizer, and a remote with four user presets.

If you're weighing other models too, our TOTO Washlet comparison chart lays out the full lineup, and our KS5 vs KS6 comparison covers the middle ground between these two.

Where to Buy With Confidence and Support

Both seats carry TOTO's engineering and build quality, so the decision really comes down to bowl shape, budget, and how much automation you want. Still not sure which one fits your bathroom?

Reach out to the Premier Bidets team. Our friendly bidet experts are standing by to help you find the perfect bidet seat for your home or business.