I'm going to be optimstic and say 360 BARELY beats out PS3 in week 1
NA:

360: 1.2 million
PS3: 800K

Japan:
360: 34K
PS3: 124K

Others:

PS3: 790K
360: 530K


total 360: 1.764 million first week
total PS3: 1.714 million

The answer is pretty obvious the 360 has the larger install base in two regions. The attach rate on the system is incredibly strong. The 360 version will have the extra content down the line. The console is the cheaper option. The console has the stronger hardcore presence.

The PS3 has the smaller install base, and that isn't going to change this year. Catching up in Europe may be possible before the end of the year. There is no hope in North America. The attach rate on the PS3 is weaker. The PS3 will not have the extra content available to supplement game sales later in the year. The console is more expensive. The console has a more casual presence. Like it or not many consumers bought the machine only to play movies.

I would use Assassins Creed as a good bench mark for sales. A highly hyped game that happened to be on both consoles, and started development specifically as a PS3 game. So I think that is is a very valid indicator. The difference in install base is actually deferred by the 360s stronger holiday lineup. So the numbers should be very good. They would tell me the following.

360/PS3 first week sales

NA 2.5/1
Oth 1.25/1
Jap 1/1

360/PS3 first month

NA 2.5/1
Oth 1/1.5
Jap 1/1

360/PS3 first year

NA 2.5/1
Oth 1/1.5
Jap 1/1

The only marked difference is that the more casual presence in Europe will defer the purchase into greater legs over the coarse of the first month for the PS3. While the stronger hardcore presence on the 360 will react more strongly on launch week. Further more I think Metal Gear is going to hurt Grand Theft Auto sales. While I do not think Ninja Gaiden will hurt 360 sales. So with the added boosts from the extra content and the lower console price. I fully expect the 360 to end out the year with a three to one margin in game sales.

I really do not want to touch the hardware sales. There are far too many variables at this point in time. Microsoft's production woes, tax refund time in the United States, economic health with gas prices skyrocketing. The economy is far too turbulent to get a good judge of the situation. Technically now would not be the time to purchase a console, but if you were to purchase a console what exactly motivates you to spend more.

*pokes Montana's sarcasm detector with a stick*  Nope, I'm pretty sure it's dead.

1st week: PS3 3m, 360 4m

Lifetime PS3 10m 360 10m

Many people around this site really don't know how to READ.

Thread Title : GTA4. Which sells more first week? 360 or PS3


Answer: 360's


Also good reading: OP's signature for everybody here with something else missing besides the ability to read.

Grand Theft Auto 4 will appeal to a larger crowd on the 360. And with the larger install base I think it's a open and shut case.

 That is a very scientific approach. I do agree with you though.

You mean the region where the 360 has outsold the PS3 11.5m units to 4.6m?

Um... Er... Ah...

*wanders off, dizzy and confused* 

PS3 will sell less copies, but have the higher attach rate WW.

PS3 will sell more copies in Europe

360 will sell more copies in America

Japan is obvious...

GTAIV will move more hardware on the ps3 worldwide.

360:PS3 First Week

Overall:

1.25:1.0

America:

1.65:1

Europe:

1:1.25

Japan:

1:2.5

This should be in the sales forum.