Eurogamer have by far the best H2H- I always go there, waaaaay better than IGN's. They use Digital Foundry (who are in possession of state of the art tech) to carry out the comparisons.
http://www.eurogamer.net/articles/xbox-360-vs-ps3-face-off-round-20 - Link to Ghostbusters H2H. Big resolution drop, lower quality textures, more screen tearing, mandatory install (3.9GB!)....basically a rubbish and lazy port. Can't see why anyone would pick the PS3 version over the 360 if they had the choice. And why did Sony get a timed exclusive on this game?!