As a Console connoisseur my 2c
I have not played GTA IV on the PS3; I did play GTA IV on the 360 for about an hour; and my main concern wasn’t the resolution; nor was it the excitement of smashing up my newest girlfriends’ car; without her even mentioning the event or yelling at me (something only achievable in the gaming world). It was the fact that I’ve played this game before … again and again and again … GTA was the only original game .. running down those Hare Krishna’s; There was just something cool about it. (I have not felt the need to run down a group of Hare Krishna’s in real life).
In reality if you have friends and they have a console; it’s probably the 360; if you don’t have any friends they would probably have a PS3.
I have all 3; (I Think I have friends, they all have 360’s; I thought said friends would come round and play; so I bought a Wii; turns out in fact I have no friends, so I bought a ps3.)
Network gaming is a real pain in the ass when it comes to the PS3 it’s great if you have no friends, as joining a random online is painless. But if you want to talk to them, or invite them to your game, it’s not going to happen; unless you and they are out of a game; or you give them a call and arrange it; harks back to PC days.
The 360, you are always online, in game, in movie (if you wish), you can invite or be invited to the game you or they are playing, and you can message in game, or chat in game.
Storage is another issue, 20GB (120GB if your lucky) or 40GB (bear in mind it’s simple to swap out the PS3 hard drive and slot in a 320GB baby no such luck with the 360).
In Essence don’t buy a console on the strength of a game that being said I bought a PS3 because I could import Rock Band before the UK got it; On the other other hand I did play WiiFit last night with some friends, and that was pretty good fun.