Kohler Highline Two-Piece Toilet vs Kohler Highline Arc Two-Piece Toilet

Both are Kohler Highline two-piece elongated toilets at 1.28 gpf with Comfort Height seating, so the core experience is similar. The K-31096-0 Highline Arc is the stronger pick: Revolution 360 with the AquaPiston valve flushes more forcefully and keeps the bowl cleaner, and it ships as a Complete Solution with seat, wax ring and hardware. The K-76301 Highline is a solid, simpler toilet with a concealed trapway that is easier to wipe down, but you supply the seat and it uses the older Class Five canister. Buyers of both praise the chair height and reliable flush; the Arc draws more praise for bowl cleanliness and the included Quiet-Close seat.

• Choose the K-76301 Highline if you want a clean concealed trapway and low-profile bolt caps for easy wiping, and you already have a seat you like.
• Choose the K-31096-0 Highline Arc if you want the strongest Kohler flush, a Quiet-Close seat included, and a box that has everything for installation.