Enthusiasts split on the two engines: the C36's stroked, cammy M104 six is described as lumpy-idling and growly and 'the culmination' of AMG's inline-six work, while the C43's S-class-derived V8 is smoother and stronger but seen by some as a more sedate, carried-over motor. Some owners find the C36 the better driver, others prefer the V8's brute strength.
C36 inline-six versus C43 V8 character
Mercedes-Benz C36/C43 AMG (W202) · driving