I kinda like the new RS7 with the exception of that enormous front grill. The rest of the lines are beautiful though!
As for performance, I'm sure we will see an M6 GC vs RS7 in due time but I would favor the RS7 in the 0-60 department and maybe even the 1/4 mile. I do think the edge may go to the M6 GC on the track though. If I had to pick one, it would be a tough call until I test drove them but going just off of looks, I like the M6 just a bit better..
I can't wait to see these two battle it out