I don't see any reason why Microsoft would hold their cards for the 'complete' version of the game. How do you build hype for it coming to one system, by not showing the difference? I'm buying GTAIV for the XBOX 360, only because it's the only console I own, but if I had both PS3 and 360, I would not feel compelled to buy it on one console over the other, due to the simple fact that MS hasn't made it clear what this exclusive episodic content was, and the decision would be purely on what console I want it on...
And I'd hate to bring it back to RRoD, but I would most definitely buy it on the PS3, so that I'm not wasting precious hours until my next RRoD on a game that's fundamentally the same on different consoles, sans yet to be revealed 'exclusive episodic content', that for all we know is Horse Armor, or a new character skin.







