They both are cameras yes, but they target different people for different applications.
If you feel there has to be a better camera, a winner, let's agree that the Sony wins and move on.
I'm not yet sure about the NEX-7, but the NEX-3/NEX-5 targeted the same customer base in Asia. Who the Nikon is targeting in the west remains a mystery.
Why do you feel there must be a "better camera?" To simplify to such an extent stifles discussion.
There are a few ways to look at this. We can discuss the main marketing target base (of the Nikons) which I'll agree with others is Asia, with the west being secondary. The market in the USA is so large, even a relatively small percentage of the market means significant numbers sold.
Or we can look at if/how the Nikon's appeal to forum members. I think this is of a higher interest. If we do this, it's natural to compare to the competition. I think most would agree the Sony NEX series is a close if not the closest competition. The cameras are remarkably similar, but obviously different in some respects. The similarities should be obvious if our eyes aren't closed, but the differences not so much. The knowledge to be gained by discussing the differences, I think, is of the most immediate value.
So I'll ask you (or anyone else) again, with so much being similar (size, weight, price, rear LCD, color choices, new lens mount/lenses, no mirror, etc, etc), what do you think the most significant differences are with the Nikon, that would sway you from the Sony with it's obvious sensor/image IQ advantages? To those in the forum I'd guess we care an awful lot about image quality/noise/sensor.. so I'm interested in what the Nikon has to offer that would motivate you to accept less in this area? I gave two examples immediately apparent to me. Focus speed (reported) and the 60fps at full rez.
I've noticed a tendency for some to insist on very focused threads when the subject has no clear focal point. Seems silly if not obnoxious. It's a discussion forum, we shouldn't sacrifice discussion for focus unless it serves a specific purpose of value.