Another comparison test that recently popped up on YouTube comes courtesy of Drive and it involves the Mercedes C63 AMG Black Series, the BMW M3 GTS and the Porsche 911 GT3 RS 4.0.
The cars are driven both on public roads and on track by Chris Harris, and it is just useless to tell you what these three models are capable of, because you will definitely get a better picture by watching the video.
We’ll just tell you that the M3 GTS is the least powerful from the bunch as it delivers 450 bhp from its tweaked V8 engines, whereas the Gt3 RS 4.0 and the C63 AMG Black Series produce 500 HP and 510 HP respectively. 
 
 
 
 
 
 
 
Video :

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Source: Drive via YouTube