With all of the additions to the PS3 version of Portal 2, including a Steam copy, cross-platform co-op play and cloud-based saves, some Xbox 360 owners feel a bit put out. Still, Valve has come out to say that Xbox 360 version has no more-or-less than any other version, gameplay-wise.
When you buy them they’re all the same,” said Valve writer Chet Faliszek. “They’re all exactly the same. Content-wise, you’re getting the same experience in them. It’s just once you start looking at co-op. The Mac, PC and PS3 can all play together, they will all get updates quicker. For some people that will make a big difference.
Source: Eurogamer