the EVO has been proven to be quicker than the STi on tracks and shoot out's.
to me.. the Subaru has the reliability, better looks, much NICER interior, better sounding engine and nicer wheels.
Now seriously... you will never be head to head with an EVO on a track so it doesn't really matter... the Subaru is a HELL of alot quicker than other cars out there.. so don't sweat it.
If you want your Subi to be faster than an EVO a few mods such as intake and exhuast will easily beat a stock EVO.
I say .. GO SUBI!