He doesn't know how to drive
The '09 with the P31 option had less power... a 2012+ would be very different. Having said that, even the base '09 C63 should pull a bit on a stock M3 if the driver knows what they are doing. They are not way faster but they are faster even without the bump to 481 HP. His car must be sick.
Fastlaps has a 2010 M3 Comp pack at 24.6s to 150mph versus 22.8s for a 2009 C63. Up to 100mph they are closer.