Good to hear that the M3 can handle a stock STi, especially at higher speeds.
Just didn't seem right that the STi was neck and neck with the M3.
Guess that 4WD is an advantage at launch, but at the expense of the top end.
Curious how the M3 hangs in with the Z at a roll.
Give me a call. We'll have to find out one day.
Ran Gladdo at Cayuga in the fall, and the diff was more than his M3 'hanging in there'. Mind you, that was from a stop.
p.s. Make it soon though. My Z may be going in for some surgery soon....