Capcom said way back in May last year that its intention was to make both the PS3 and 360 versions of Devil May Cry 4 pretty much identical.
It looks amazing, that's for sure. The environments in particular - there's so much detail in there, which gets lit up by the massive sparks off Nero's ridiculously large sword as he plants it into the heads of his foes.
We did a bit of video trickery to get both versions running side-by-side as closely as possible, so you can take your magnifying glass to the screen in an effort to spot a difference. You won't be able to though. Not unless you're Superman.