Kohler Cimarron Comfort Height Elongated Toilet vs Kohler Corbelle Comfort Height One-Piece Elongated 1.28 GPF Toilet

The Cimarron ($420-480, two-piece) and Corbelle ($720-820, one-piece) are both AquaPiston canister-flush Kohler toilets with 1.28 GPF and comfort-height seat. The Corbelle additionally features ContinuousClean technology — a rimless bowl design with a single angled water jet at the back of the rim, eliminating rim-hole buildup and uniformly washing the bowl. Form-factor matters more than mechanism here: the Corbelle's one-piece body eliminates the tank-bowl joint that two-piece toilets accumulate grime at, and wipes flat for cleaning. The ContinuousClean rim reduces hard-water deposit problems specifically. For hard-water households, the upgrade is materially valuable. For soft-water areas where the rim doesn't scale, the differences are largely aesthetic.