OK, I own them both, the Rebel T4i AND the Canon Rebel T3i.
Why? Good question.
I think the plan is to sell the old one, but it’s so hard to part with old friends. Actually, the T3i is not all that old. I got it about a year and a half ago.
It has been an awesome camera. I bought it just to try it out. My plan was to send it back before the month was up (Amazon has a great return policy). But I still have it because it turned out to be an amazing camera.
The T4i has already proven that it is a “keeper.”