5D3 vs 5D2: Focus accuracy with 50/1.2

I find the Mark III more accurate. On the center spot it's not a huge difference, but on the outer spots it's night and day. In my case, the Mark III is much more accurate on the outer focus points. For the center one, I'm okay using either camera.
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http://www.jackkurtzphotography.com or
http://www.sportsshooter.com/members.html?id=4177 or
my PhotoShelter Archive
http://kurtzjack.photoshelter.com/