Detailed Bidet Toilet Seat Comparison: TOTO S550e WASHLET VS. Kohler Novita BH-90/BH-93

NOTE: Both of these bidets have been discontinued. If you’re in search of the perfect replacement, tailored specifically to your needs and preferences, we’re here to assist! Contact us to discover your ideal bathroom solution with personalized guidance from our dedicated experts.

View These Models

Kohler Novita BH-90

TOTO S550e WASHLET – Classic Trim – Elongated

TOTO S550e WASHLET – Contemporary Trim – Elongated


Since the prices for the TOTO S550e WASHLET and the Kohler Novita BH-90/BH-93 are close ($1211 and $629.00 respectively), it can be easy to assume they’re very similar models. However, they’re more different than you might think, and we’ve detailed the major dissimilarities below so you can be sure you’re choosing the right model for your needs.


Classic Trim


Contemporary Trim

Kohler Novita BH90





Models Compared


Kohler Novita BH-90

Color OptionsYes (2)No
Trim OptionsYes (2)No
Size OptionsElongatedRound or Elongated
Hide-away Cord & Hoseconnect+No
Remote ControlDouble-sidedSingle-sided
User PresetsYes (2)No
Mute FunctionYesNo
Nozzle ConfigurationSingle NozzleDual Nozzles
Wide SprayYes (2 settings)No
Power CleansingNoYes (Turbo)
Easy to Remove Nozzle TipsNoYes
Nozzle SterilizationEWATER+Silver Nano
Water Flow0.8 gal/min – 0.11 gal/min0.10 gal/min – 10.14/min

Detailed Comparison of the TOTO S550e WASHLET and the Kohler Novita BH-90

Look and Feel

Color Options

Kohler’s Novita BH-90/93 comes in white while TOTO’s S550e WASHLET comes in both cotton white and sedona beige, making the S550e compatible with a wider range of bathroom color schemes.

Trim Options

The TOTO WASHLET S550e has two trim options, classic and contemporary, that allow you to pick a seat that best complements the rest of your bathroom. The classic trim features a beveled edge, and the contemporary trim has a smooth edge. The Kohler Novita BH-90/93 comes in only one trim that features a smooth, non-beveled edge.

Size Options

While the TOTO’s WASHLET S550e comes in two colors and two trim styles, it only comes in the elongated size. If you’re looking for a bidet seat that will fit a round toilet, then Kohler’s Novita BH-93 is for you. Kohler’s Novita BH-90 and BH-93 are identical in every way other than that the BH-90 fits elongated toilets and the BH-93 fits round toilets. However, if you’re heart is set on a TOTO unit, the good news is that the TOTO S350e comes in round only and offers the same features as the TOTO S550e.

Hide-away Cord & Hose

The S550e WASHLET comes with TOTO’s special connect+ system that keeps unsightly cords and hoses hidden from view, while the Kohler Novita BH-90 does not.

Wash Features

Nozzle Configuration

The Kohler Novita BH-90 & BH-93 comes with dual nozzles whereas the TOTO S550e has a single nozzle. In a dual nozzle system, the nozzles are a little off center, and only one of the two nozzles actively sprays at a time. In a single nozzle configuration, the sole nozzle is centered. Neither configuration is necessarily better than the other, and the choice comes down to personal preference. We prefer the centered nozzle of the TOTO S550e.

Wide Spray

What TOTO’s WASHLET S550e’s single nozzle does have is an adjustable spray width that offers a wider or narrower cleansing spray depending on your preference. The Kohler Novita BH-90/93’s spray is static and not adjustable.

Power Cleansing

The Kohler Novita BH-90 and BH-93 have a turbo wash feature that provides a significantly stronger water stream for extra thorough cleansing after particularly messy bowel movements. The TOTO WASHLET S550e does not have this.

PREMIST & Aftermist

While the TOTO S550e WASHLET doesn’t have a turbo mode, it does offer PREMIST and aftermist. PREMIST and aftermist are standard amenities that come with any TOTO bidet product, and it involves spraying EWATER+ to help keep debris from adhering to the toilet bowl. PREMIST automatically coats the bowl with a thin film of residue-repelling EWATER+ before use, and aftermist activates 25 minutes after the last use.

Nozzle Sterilization

Both the Kohler Novita BH-90/BH-93 and the TOTO S550e WASHLET sterilize their nozzles regularly but have different methods of doing so. TOTO uses electrolyzed water (EWATER+) to accomplish this, and Kohler utilizes its silver nano technology.

Water Flow

As far as water flow is concerned, the TOTO S550e WASHLET is slightly gentler and has a range of 0.8 – 0.11 gal/min. The Kohler Novita BH-90’s water flow is mere fraction stronger with a tiny bit wider adjustment of 0.10 -0.14 gal/min.

Comfort & Convenience

Remote Control

The remotes for both models offer a sleek, modern feel with a touchscreen and optional wall-mount. The only difference here is that the TOTO WASHLET S550e’s remote is double-sided. A very simple, easy menu of buttons to adjust the basic amenities is found on the remote’s front, and the advanced settings are accessed through a menu selection on the back. The remote for the Kohler Novita BH90/93 has all the controls on the front.

User Presets

Once programmed, the TOTO WASHLET S550e allows two presets.  This allows you to save settings for yourself and one other person allowing both of you to get a fine-tuned, personal cleansing at the press of a button. The Kohler Novita BH-90/BH-93 doesn’t offer user presets.

Mute Function

The TOTO S550e’s bidet seat remote beeps to indicate that a button has been pressed. While this is usually helpful for new bidet users and for troubleshooting, some users get tired of hearing the beep each time they select a setting. For an extra layer of discretion or to remove a potentially irritating noise, the TOTO WASHLET S550e allows the remote’s beeping to be muted. The Kohler Novita BH-90/93 does not offer beeping at all, giving you less feedback from the remote from the get-go.

Easy to Remove Nozzle Tips

The Kohler Novita BH-90’s nozzles are far easier to remove than most models on the market. They have threads that allow the tips to be conveniently twisted off for deep cleaning or replacement. Unfortunately, the nozzle tips of the TOTO WASHLET S550e have to be removed at a TOTO facility. This is an important consideration for any potential buyer with hard water, as sediment builds up in the narrow tip of the nozzle first, potentially leading to clogging.  Being able to replace the nozzle tip allows the seat to offer a longer life span for those with hard water without having to send the seat in for repair.

Other Differences


There’s only a small price difference between the TOTO S550e WASHLET and the Kohler Novita BH-90/93. The true differences lie in the convenience features and wash options offered and which of these choices are most desirable depending on your needs and preferences.

Final Thoughts

The differences between these two models are vast even though the prices aren’t all that different. When it comes to choosing the right bidet seat, the TOTO S550e WASHLET has a lot to offer even though it is the least expensive of the two. However, the Kohler Novita BH-90/93 offers easily removable nozzle tips which is hard to refuse if hard water is a factor in your decision.

Additional Details

Model Numbers (SKUs)


TOTO s550e (WASHLET+) – Classic Trim – Cotton White: SW3054T40#01

TOTO s550e (WASHLET+) – Classic Trim – Sedona Beige: SW3054T40#12

TOTO s550e (WASHLET+) – Modern or  Contemporary Trim – Cotton White: SW3056T40#01

TOTO s550e (WASHLET+) – Modern or  Contemporary Trim – Sedona Beige: SW3056T40#12

*NOTE: WASHLET+ refers to a version of the seat that allows the hoses and cords to be hidden

TOTO Standard SKUs:

TOTO s550e – Classic Trim – Cotton White: SW3054#01

TOTO s550e – Classic Trim – Sedona Beige: SW3054#12

TOTO s550e – Contemporary Trim – Cotton White: SW3056#01

TOTO s550e – Contemporary Trim – Sedona Beige: SW3056#12

Kohler Novita SKUs:

Kohler Novita BH90-EW Elongated White

Kohler Novita BH93-RW Round White

View These Models

Kohler Novita BH-90

TOTO S550e WASHLET – Classic Trim – Elongated

TOTO S550e WASHLET – Contemporary Trim – Elongated

Back to Comparison Listings

Kohler Novita BH90 and BH93 Bidet Seat Comparison Listings

TOTO S550e WASHLET Bidet Seat Comparison Listings

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