The only difference, as of the last consoles, was how many developers were on board with Sony (being a japanese company) versus what developers worked with MS. If alot of developers see the ease at which they can produce games on the 360, rather than the PS3, that will also help MS win the war. Probably another good reason that the 360 is coming out first: gives developers a chance to see and develop before the other consoles. They may prefer developing for MS this time around rather than for Sony or Nintendo. That is Sony's only real advantage in the first place, more developers and publishers.
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