What ever helps your justify your purchase.
It is not enough of a difference to matter to me and could be made less of a difference by messing around with contrast and brightness settings. It is not like one is completely superior or inferior to the other where the game is unbareable on one system.
People always said the last couple of CODs looked washed out on the PS3. I played them on both systems and Xbox 360 version didn't make me want to ditch the PS3 and go out and buy an Xbox. It is not like people play constantly with a side by side comparision of the other system daily.
Battlefield sucks anyway.