The vast majority of the time, multiplatform games are basically identical across the two power platforms; the PlayStation 3 and Xbox 360. There are some exceptions of course (and we're not counting the first year where crappy 360-to-PS3 ports were common), but for the most part, there are very minimal differences.
However, when you have a game that's as massive as Final Fantasy XIII , you may encounter a few major obstacles that prevent the two versions from being nigh-on identical. From the time FFXIII was announced for the 360, the naysayers have wondered how Square-Enix will approach the two different formats, and how they'll deal with the greatly reduced storage space on the DVD for the 360. Well, here's yet another example of that issue: according to Crious Gamer, Square-Enix may not include Japanese voices with the 360 version of FFXIII. But PS3 owners don't have to worry. Said Yoshinori Kitase:
"Obviously, when we talk about XIII it’s for PS3 and Xbox – with PS3 being on Blu-ray there would be enough memory, but on Xbox probably not. At the moment we’re thinking of releasing the voice in English only. Are there many people who would like to play with Japanese voices?"
Look, although we don't mind that 360 owners will get this groundbreaking title, we've been saying from the start that in this particular case, the PS3 version will be superior. And almost every time we hear of a new update, it's a "for instance" situation of how Blu-Ray's enhanced storage capacity is allowing development to progress smoothly, while the standard DVD format for the 360 version is causing a few hitches. For the sake of 360 owners, we hope Square-Enix doesn't have to strip anything more away from the production, but at least the developers aren't taking stuff out of the PS3 version just so it can mirror the 360 version. That'd be just…wrong.
Related Game(s): Final Fantasy XIII