We all know that PS3 do have the edge on the Xbox 360 when it comes down to storing data on to a game disc thanks to its blu-ray technology. This means that some times Xbox 360 users are given a game over 2 or more discs. Well the same goes from Battlefield 3. PS3 users will get everything all crammed in to one blu-ray but the Xbox users will get 2 discs, one for offline and one for online.
Its not much of a problem, but it is a little pain, but that pain can be ignored now that DICE have revealed that Xbox users will get a High resolution texture built in to the game that you can install to improve your graphics even more.
EDIT: DICE have now said PS3 will also support this