CameraTown have put together an in-depth review of the Canon Rebel T2i versus the Canon EOS 7D.
When the Canon T2i was first announced it surprised many in that it had quite an extensive feature set that included an 18 megapixel CMOS sensor and full HD 1080p movie recording. A lot of the features on the Canon T2i have been handed down from the Canon EOS 7D. The T2i is around $850 cheaper which makes you wonder which of the two cameras you should choose... the more expensive Canon EOS 7D priced at $1,649.95, or the Canon Rebel T2i priced at $799.99 which would give you an extra $850 to spend on lenses.
Deciding which camera to buy all depends on what you will use it for. The Canon EOS 7D has a stronger more rugged body and is designed more for professionals. The Canon Rebel T2i is still an excellent camera. If you are mainly shooting video then both cameras are on par, but should photos be what you are after then you need to compare the frame rates and "if" you actually need the frame rates and AF performance amongst other things.
The full comparison along with a video of the unboxing can be found over here.

