idk about sti's but lightly modded evos will kill any near stock m3's on the track, hands down - you guys must not pay too much attention to that 'scene.' IDK how M3 owners are claiming otherwise except for the fact that it just doesn't make any sense to them.
Tuned evos with upgraded (but still stock sized turbos) will run with r35 GTRs, and always run at the top of the pack in time attack series races. Few examples, include the RyanGates EvoX, any AMS TA car, and for more extreme the HKS evo and the sierra sierra Evo (which are a couple of the fastest time attack cars in the world, and would destroy the ALMS M3).
if you guys are talking about drag racing though I have no idea. And obviously stock, in terms of performance they are not in the same class, and they will never be in the same luxury class.