Well it might sell more overall for the PS3 but SE just wants more copies sold, and right now 360 is dominating Europe and America (Wii excluded of course), so it was just a logical move. FFXIII is still exclusive in Japan and that's where the PS3 is dominating (again, Wii excluded).
This just sounds like another "Square betrayed Sony" thread which is bs. The same could be said about Nintendo back in the N64 days, but Nintendo decided to stick to cartridges while Sony went to disk which was better for developing. Square wants FF to sell, and there is more of a 360 userbase in the Americas ans Europe than PS3. It was just a business move. SE was never a second party developer for Sony nor any other company... they are third party which means they develop for all platforms. Some people don't seem to understand that.
