Oh I see. The AT-OT is pretty cool! I like how it has 6 clone troopers and 2 pilots, instead of the two or three clone troopers that you usually get. Even the AT-TE only had 1 clone trooper and Captain Rex (who is pretty sweet).
The Dropship has the cool locking mechanism for carrying the tanks... I think it can carry both the AT-OT and the AT-TE. It has some pretty good weaponry for being a carrier, with the two front guns, the tail laser cannon, and the missiles on top.