Haha then the car lost its balance because the weight was not well distributed anymore...Too much weight on the side of the puncture because of the nail and repair liquid.
And a lower pressure on a tyres explained why it was slower than the M3 and less balanced.
No seriously, I think it is clear now that the M3 is both a bit faster and a bit more comfortable, and that it seems to be less difficult on the limit.
The C63 is more raw, brutal, feels more powerful, has more steering feel...Accelerates faster.
But first, nobody drives these cars on the limit and without ESP, second these limits are so far that nobody "normal" can reach them on the read without driving like a madman (and then crash, with any car).
These two are so close that you can't be wrong with any of the two. It is a matter of personal preference, but gone is the time where a M3 owner could see an AMG owner with some kind of commiseration. And that is a milestone given how good an M3 is.
Remember that many reviews were saying the C63 better, and faster than the M3, before the head-to-head tests. It means the C63 even can be considered as more entertaining and fun in everyday situation...when you have no tome-attack, track and professional driver...
Two fabulous pieces of engineering, two fabulous pieces of dream.