Link to the exact time he helps settle the AWD vs. RWD debate for on-track, perfect conditions performance:
https://bit.ly/3CyLN3i (had to convert to bit.ly since the forum removes the time marker and embeds the video in place)
"In the rear wheel drive car, you have to come away from the throttle.
I kept it absolutely nailed then.
Honestly, if you're gonna get yourself an M3, THIS is the one to have. It's the one I'd have.
Didn't think I'd say that once, but yeah, a four wheel drive M3 is DEFINITELY the M3 to have."
Also, the xDrive was faster around the track by half a second, compared to their other RWD G80 M3. Exact same conditions, same driver, same day. About 1% faster for that track in perfect conditions.