The online play for the xbox and ps3 versions in virtually identical. There were slight differences in the release of dlc and patches for both console, with the Xbox version getting them first in most cases.
Nope
No, only two.
no..
The Xbox has nothing to do with the ranking on Call Of Duty, thats the online game developers of COD (Infinity Ward) error.
It depends... anything has is but Wii, and for Xbox, you have to have Xbox Live.
yes only if you have xbox live
Yes. I have played Call of Duty games online with a wireless connection with PS3, Wii, and Xbox 360.
Yes it is.
On xbox 360 yes.
No.
Nope
No, you cannot play cod world at war online with two players on same console and samething goes for call of duty 4. But you can for halo 3.