Looks department yes, I agree the M2 looks better. Handling if you want fun drifting then obviously the RWD M2 would be the one, but if you want point-to-point going fast in touge, not sure. In the wet, the AMG theoretically should have the advantage. Drag, well the zth times is just 0.1 sec edge for the AMG which is practically even, but real world especially when pick up from cruising speeds might be different case.If I had to choose between the M2 and the CLA45 or A45, the M2 wins hands down in the looks department and possibly the handling department. But the Mercs would probably beat the M2 in a drag race.
However I don't really care about those things and it all just boils down to personal preference.
Yup, it's all personal preference. Gotta test drive both to really confirm which is the better car.