Upload & Sell: On
I went back to the Sony store and specifically tested the NEX-6 and NEX-7 viewfinders side by side, and the NEX-6 EVF is significantly better, primarily because it has a much higher refresh rate. The NEX-7 EVF couldn't keep up with people's legs while walking, and had a kind of strobe effect (not much light may have exacerbated this). The NEX-6 was fluid.
This is completely accurate in my personal experience; I sent my first NEX 7 back because it was absurdly sensitive to eye placement and I was not able to obtain a sharp view through the EVF no matter what I tried with the diopter and jpeg settings. When I say "sensitive" I mean one had to position one's shooting eye in the absolute centre of the EVF to get a clear picture. The second one was identical, and I was never able to look comfortably through its EVF and this was the reason I sold it.
Now, I am using a pair of NEX 6s, and their EVFs are excellent. I tend to ignore specs and use a camera until I either like it overall, or sell it (like many others here!). I was concerned about the NEX 6 EVF for exactly the reasons others have offered, that it was the same specs as the NEX 7; they may be on paper, but in use are substantially different.
If anyone is interested in how I use the NEX 6 bodies for stills and video (I need both capacities when working on the road, which is most of the time now; just back from Vancouver yesterday), I have been blogging on this. I saw that someone was criticised for just posting a link to their blog, so please ignore the links below if you are in that camp!
Why the NEX 6 is the best compromise stills/video camera presently (http://wp.me/p1QR8D-3B)
Revisiting the Sony NEX 6 as a dual function (stills and video) device (http://wp.me/p1QR8D-6m)