The Roomba S9+'s D-shape digs into corners the Qrevo can't reach

The Roomba S9+ has two things going for it on carpets: powerful suction and a D-shaped design that shoves right into corners. Round robots leave a little arc of uncleaned carpet in every corner, but the S9+’s flat front edge eliminates that. The Roborock Qrevo is still solid on carpets and outperforms the Roomba on hard floors, but for wall-to-wall carpet, the S9+ cleans more thoroughly with less manual touch-up. The shape advantage is one of those things you don’t appreciate until you see a corner that’s actually spotless.