Well you can forget that track idea. AMGs cannot track the way BMWs can. Their G-force sensor reaches a limit point and will put the car into limp mode.
You cant really compare these two cars. One is for young successful men or active older men who have been driving their whole life. The other is for hot MILFs or older guys who are overweight and spend their retirement before they collapse of a heart attack.
This is not really a comparison. If you know how to drive, get the M3. If you have no idea what you are doing but are able to keep the wheel straight and the pedal down...get the benz.