"It was...a pleasant surprise when I discovered FFXIII runs just as smoothly on 360 as it does on PS3. It's a brisk, action-packed RPG with tons happening on the screen at any given time (and the series' requisite flashy visuals cranked up to full throttle), yet I didn't see a hint of slowdown or choppiness or screen tearing or any of the other visual hiccups that serve as hallmarks of a sloppy port. Admittedly, I didn't see the two versions running side-by-side — the bus set them apart with a looping trailer dividing the kiosks — but I honestly saw no tangible difference from my time with the PS3 version."
This shot is from the PS3 version. Or the 360 one. I don't know.
A very good job by SE this is! Lead developed on the PS3, and announced for the X360 in the so very famous-Internet explosion-milk drinking fanboy-megaton, the two versions, when not run side-by-side, are equal to whoever played one after the other. Sure, that side-by-side comparison is inevitable, but if it's nothing the naked eye can't notice, it's not too important.
However, that raises the question... how is it that Sega managed to screw up the PS3 port of Bayonetta so bad, if SE reached complete gameplay equality? It's a sad case.
The only differences that do exist between the two as announced by SE are:
-Audio and video are uncompressed in the PS3 version, compressed in the 360 one (great for you tech fanatics).
-The PS3 will have the game on one dual-layer Blu-ray, the 360 will have it on three dual-layer DVD's. That we already knew.
Source: VGChartz