PS3 will see a larger boost in Europe...except for the UK where it will be a dead heat.
Xbox 360 will see a larger boost in North America.
GTA PS3 will outsell GTA 360 by 3:2 in Europe.
GTA 360 will outsell GTA PS3 by 5:2 in North America.
If the game launched at the same time in Japan, you'd see a 30% or so boost for both consoles. The last GTA in Japan sold about 300k if I remember correctly, on both PS2 and PSP.
People are difficult to govern because they have too much knowledge.
When there are more laws, there are more criminals.
- Lao Tzu