@ Garnett
Trolls like you always misread. For the sake of accuracy I have many times in the past stated any PS3 game can be done on the 360 and vice versa. I was talking about sacrifices here and with regard to LittleBigPlanet was specifically pointing to online functionality (like the wealth of user created content).
Multi-platform publishers usually want to provide a similar experience across both platforms (this to not to upset anyone).