Let's go back a couple of years, to E3 2008. At the Microsoft Press Conference, the company drops the news that Square Enix has agreed to release Final Fantasy XIII simultaneously on both the PlayStation 3 and Xbox 360. There is much cheering and/or weeping and gnashing of teeth, depending on which side of the console wars you are on.
Two years later, in April of 2010: Final Fantasy XIII is released on both consoles simultaneously. And the most recent NPD report says that while the Xbox 360 version sold a respectable 493,000 copies, the PS3 version sold 828,000 copies -- almost twice as many.
We'll let you guys sort that one out for yourselves. Do remember where the consoles were at in both places -- back in 2008, the Xbox 360 had an early lead on big software (LittleBigPlanet was Sony's biggest game of the show), and these days, PS3 sales are doing much better. But we will say that, according to NPD analyst Anita Frazier, this is Final Fantasy's biggest launch ever, and that XIII has topped the first-month sales of XII by 48%. That's a lot of l'Cie.