I only rode the REV for 10-15 minutes, but liked it. Little different feel for sure...light front end...narrow...seemed like I was going to fall over the front of it at times. Never really got a chance to sit down on it so I can't tell you what the different seating position feels like. Power from the 800 HO is good...climbed well but not as good as the 900. It was a 144" x 16" wide track, and looked like 2" paddles. It was a rental and I think it could use different gearing...seemed to spin the track as soon as you got on the gas, although all the new Summits I've ridden seem to do this. Personally, I don't like that...trenches too much. The 900 Kitty seems to be geared different...not as much early track spin. Seeing more and more of them on the mountain all the time. What's wrong with it? Small trunk space...no place to put your helmet/goggles under the hood to defrost. That's all I noticed...conditions were too good to give up the 900 for a rented REV.