and a much wider variety of ISO? pretty sure people recommend using only native ISO's if you can, which means the T2i already contains all the ISO's you would want, even if you were shooting on a 7D. and if you ML your T2i, you get sooo many different ISO's. there are no unlisted features of a 7D that make it better for video. there is no difference. 7D is a more durable and professional body, that's it. T2i, once ML'ed, is more optimized in terms of customizable video features.