In my opinion, I prefer the Mercedes-Benz C43 AMG because it has V6 BiTurbo rather than the C63's V8 BiTurbo
(C43 AMG)
(C63 AMG)
I also prefer the C43 as it is more as it is also more of a exclusive car, and the engine sounds better (but this is my opinion)
LEAVE IN THE COMMENTS WHICH ONE YOU PREFER