Well....the thing is, FFXIII was announced for 360 a while later then PS3. So while its easily possible for the 360 to have more sales then PS3, its quite possible for the PS3 since many people thought it exclusive for a time.
HOWEVER.
Past trend have shown that blockbuster titles like this move many consoles for those buying the game on the day and week the game is out. So we don't quite know.
But because of the points you mentioned, I'm gonna say 360 for the West.

GOTY Contestants this year: Dead Space 2, Dark Souls, Tales of Graces f. Everything else can suck it.







