@ salman_ksa:
Mercedes C63 AMG is a 6.2 ltr engine which produces 457 hp/ 600 Nm, whereas M3 is a 4 ltr engine and produes 420 hp. any intelligent guy out there can judge the difference and say which technology is superior and more advanced.
its just not how quick you can reach from point a to point b, the track performance of a M3 is far more better than a C63, you talk about topgear i think you forgot to see the ending, two of them choose to have a BMW M3, even jeremy said bmw m3 and he himself owns a BMW M5.