I'm going to guess these were shot as jpgs with AWB and say the 1st and 3rd are from the same camera and the second from the other. Because these are greatly reduced images it is hard to say which is which but I'm going to say the 5DII would do a better job at AWB and say 1&3 are 5DII and 2 is 50D. I think the 2nd has less DOF fall off about the face that also leads me to believe it may be the 50D.