My guess is the PS3 version will sell more proportional to install base than the 360 version due to Vader exclusivity. (Although I have a 360 and not a PS3, I vastly prefer d-pads for fighting games. I don't believe the d-pad will significantly affect sales, however.)
Because of the higher proportional sales, I believe the PS3 version will sell more worldwide while the 360 version will sell more in North America.







