In what way is the D600 better? I say it is not.
As neuro said, feel free to believe in anything you want.
I've tried the 6D and 5DIII side by side.
Surprisingly, the 6D felt more comfortable in my hand.
The 1-point AF system was also responsive and snappy (I did not bother with the outer AF points whatsoever - what's the point).
So yes, I have tried the 6D.
I know that the 5DIII is an overkill for me, so I wish the 6D did not have the hideous button placement at the back.
Like I said in a previous post, this is the deal breaker for me.
Others might be fine with it; I'm not.
Btw, the 70D specs were just leaked
It will have the same AF system as the 7D - 19-points, all cross-type.
Compare this to the AF system on the 6D, a higher-end body (supposedly),
It's a shame (disgrace?), really.
Enjoy your 6D. I'm glad it's working out for you. Amen.