I've only ever used one tube, so I don't have anything to compare, but my Super Fat Cat with inflatable seat and back rides high. My butt gets wet but that's about it. I do wish the pockets were removable. The built-in "cup holders" are a nuisance. The large area behind the seat is very useful.
This may sound silly, but the thing I like most about my float tube is simply that I can manage it. I live in a studio apartment with no garage, and so my "fishing boat" lives folded up in a closet.
Having the tube gives me access to water that I wouldn't have any other way. I was getting burned out on shore fishing, but the tube has changed everything.