Square Enix has just confirmed a couple of differences between the
Playstation 3 and Xbox 360 release of Final Fantasy XIII. In an interview in
Famitsu they state that the video and audio is compressed on the Xbox 360
DVDs while the Playstation 3 version will be uncompressed and appear on a
dual-layer blu-ray disc. The 360 version will obviously be released on
multiple DVDs. This means that the uncompressed game will be 25GB minimum,
and of course the Japanese version is exclusive on PS3.