[ChrisM4]

I’ve owned both and prefer the M4. The M3 has more wind noise than the M4 with the way the rear fender arches flare and you feel higher in the car even though you’re not. (Probably from the door/window layout between the coupe and the sedan) I’m guessing the M4 is more aerodynamic too for high speed driving just based on its shape but you’d have to confirm official CdA with BMW.

They’re both amazing models so it depends on what you’re looking for really…practical sedan or GT coupe.