There had been speculation that putting Final Fantasy XIII onto the Xbox might cause some trouble if they wanted it on one disc. Now there's speculation as to whether the PS3 version will be a standard or dual-layered Blu-Ray disc. The dual-layered discs can potentially store up to 50GB of data, which means that there will be two scenarios for the 360 version. One, quality is severely reduced. Two, quantity is severely reduced. Of course, there's always the chance that both scenarios will occur, in which case I feel sorry for all 360 owners right about now. Although, you never had the game to begin with, so no loss there... I guess. In addition, the demo that players were given only used half of the PS3's power. According to Square-Enix, the final version will use all of it. It should be noted, though, that the developers admitted that they had trouble working with the limited 512MB of RAM.
Of course, this is just one of many things discovered upon the trial of the Playstation 3 demo of Final Fantasy XIII. Highlights include a significant increase in the quality of the graphics, spells creating after-effects during battle, and cutscenes being rendered in realtime, rather than in CG. Fun times? Not if you're with Microsoft.
Source:
The Magic Box