Um lets look at the last PS exclusive title that went multiplat shall we.... DMC4...
Ps3 > 360 by 130k (With the NA being a 60/40 split =)
Now before you people say "well that includes japan" You have to realize that Ps3 has been constantly out selling (by a good amount) the 360 on a weekly basis in NA and others. So right now the user base for the Ps3 has an advantage over the 360's from 2 months ago.
You also have to take into consideration that GT5:P is being released in NA this week. I do not believe that it will sell anywhere near Europes numbers (Half of them at the most) But it will push HW before the release of GTA4 to give it another slight advantage.
For the people who think DLC was the deciding factor. I point you in the direction of Gebx's post. Not many Joe Dick and Harrys know about this. If they do know about this they also probablly know about Haze MGS4 and other releases. Thats what we call hardcore gamer.
I do not believe the Ps3 version will outsell the until the Japan release but I do believe it will be closer to 60/40 in favor of 360 in NA and about 55/45 in favor of Ps3 in others







