Well, apperantly clamshells are better cause they keep people in them better! (even though its human fault) Clamshells are very comfy if a little bulky, theyre better for when you get ejector air and whatnot so it doesnt hurt. T-bars on the other hand are alot smaller and comfy too, but when it comes to ejector and your not seated right it could really hurt, or just after a bunch of rerides. In the end I think they come pretty even BUT I think Im gonna lean on the T-bar, with or without ankle restraints.