With my experience with the gen 1 bob I would get sloshed around pretty good in the surf, have not ridden one in the surf, but every time I did a trick or lose momentum I ended up in a tail stand, dragging a leg to get back up on step quickly. the XFS wasn't like that to me and felt much more stable, confident and flickable. But they are both very short hulls and would make for some FAST rotating backflips like Zack was telling me one time, and would make some crazy in the pocket trick possible like what TC is tryin to do. Backflip re-rentrys?!? sick!