Yesterday, I bought the 13" as I'd been missing having a laptop for quite a while since moving to the iMac from my old MBP. I posted yesterday explaining how I was a little disappointed with the screen and felt more than a little aggrieved that it came out of the box with a scratch on it. For this reason, I went out this morning and got the 11 with the intention of comparing them, just to see if I'd gotten a raw deal. I got the 11 ultimate, plunked it down next to the 13 and I immediately noticed a difference, aside from the obvious. The screen The screen on the 11 that I have is vastly superior to the 13. Obviously, there is a pixel density difference, but the colour is superior on the 11 by a long shot. This is not a case of viewing angle -- at the same angle, the 13 still appears more washed-out and is really quite grainy. This is particularly noticeable on the dock icons, which look horrible on the 13. In addition, and I can't explain why, the 11 for me is far easier to read from. I suffer from floaters in the eyes, and when using the 13, they get really quite bad. The 11 by contrast seems much easier on my peepers, I don't know why this would be -- possibly backlight strength, even with the 13 on a dimmer setting, the problem is still worse than I notice on the 11. Battery life Sadly, this feels quite a bit shorter on the 11 than the 13, but frankly I'm willing to live with it, as the benefits of the screen far outweigh the hour and a half less I get before charging. Anyway Sorry this is a bit light on details, but I thought I'd post it just in case it helps anyone make a decision. I'll post more info when I've tried them out against each other a bit more thoroughly. Regardless, the 11 is definitely ahead so far, 13 will probably be taking an all expenses paid trip back to Cork.