Ian Cummings detailed the differences himself on these very forums. They are exactly the same.
Subtle differences:
PS3 may drop frame rate on replays to prevent performance hits to actual gameplay, due to the different way that replays stream on PS3 (from hard drive) and on 360 (from RAM)
360 replays currently have a bug that don't allow them to play the entire replay. I think they have said that a fix is forthcoming.
The FMV in the game (the Extra Point shows, etc...) look better on the PS3 because of the Blu-rays capacity.
That's it. I don't have a link, but if you search 360 vs PS3, you will probably find it.