I have a late-2008 Macbook Pro 13" 2.53 Ghz Unibody with the 512 MB of vRAM, and a a mid-2009 Macbook Pro 15" 2.53 Ghz Unibody with 256 MB of vRAM. I have noticed an incredible difference in the quality of the screens, including the brightness. My 15" seems to be very bright and vivid compared to the 13". Can anyone verify this?