Had a chance to drive my friend's 991 C2S back to back with my M3, so I figured I'd leave a short review comparing the 2:
What I like on the Porsche more than the M3:
+ Interior is gorgeous, but that's obvious
+ Less body roll than my M on Swift springs
+ Perfectly weighed clutch
+ So much more grip coming out of corners
What I thought was better on the M3
- Engine noise, no comparison
- I thought my friend was exaggerating, but between 2-4k, that 911 really isn't all that fast. I'm sure it's just deceptive, but it feels like a dead spot, then past 5k it pulls like crazy.
- Even with center muffler delete, the car is very quiet
Both amazing cars to be honest, I still don't think they really compete against each other, but it was nice to get to drive them back to back. I still plan on owning both one day.