5D , 7D and Mark IV compared

http://blog.planet5d.com/2009/12/more-side-by-side-video-from-the-canon-eos-5d-mark-ii-7d-and-1d-mkiv/ , neat video. I like the 5D Mark II the best :-)

I would imagine the full frame sensor should look better, all other things equal.
I guess it all comes down to how much you want to spend.

I like the new video from Vincent Laforet, also has some behind the scenes.
http://blog.vincentlaforet.com/

Interesting!! But the robot dance was taxing my attention..It was a bit alarming.
"go the robot" try that down at the local club on a night out.

Agreed. The robot creeped me out