The Nikon D800E Outscores the D800 on DxOMark
The differences are incredibly small, but significant enough to merit a higher score, and photo quality that's technically better - at least in a testing environment. The biggest difference seems to be the absence of an antialiasing filter on the D800E, resulting in sharper pictures overall.
You can check out the full comparison from DxO for all the nitty gritty details.
