Canon APS-C sensor vs The Competiton.
The Competition Wins. :|
It might be closer with this next round of products if Nikon continues to inexplicably put that 24mp sensor into everything they have. The 16mp was tremendous but apparently both Sony and Nikon decided it was getting long in the tooth - you can now get a D5100 or NEX 5N for practically nothing while they clear out stock. If Canon can produce a sizable improvement in the 7D2 sensor then the playing field could be level or even swing the other way quite easily.
Edit: the D7000 for under $1000 new is an absolutely amazing deal! If I hadn't already blown a chunk out of my bank account with my current kit then I would be all over that.