the third screenshot in particular shows the PS3 versions reflections are a little more pronounced. again, minor difference, but its quite easy to see there.
i personally don't see much aliasing, i was simply replying to TrungGap and saying i don't see any more aliasing in the PS3 version than the 360 version. both use 2xMSAA.
I was referring to the reflection. In the 3rd screenshot, on the door, you can clearly see that 360 has a some sort of filter/anti-alias applied. Where as on the ps3, it looks chunky.
In addition to reflection, you can see better definition of the letters on the rear tire of the car (360 vs PS3).
Not that any of these differences going to matter during the game.