ah it looks like that was the case from 2008-2010, and for 2011, they detuned the WRX to help the STi catch up, but the WRX still edges it out a little bit. I think the main difference in timing is 5 speed vs 6 speed - one shift to 60 vs two. (even more motivation to tune the car!)
the STi is the package to have if you'll be tracking the car often, but I'm more of a once-a-year type.
http://www.caranddriver.com/reviews/...take_road_test
you'll find these reviews from just about any car site. I'm not sure what Subaru is thinking. They gave all of the track-must have options to the STi but it should be faster then the WRX too.
the good news is, on an actual track, the brakes would be fading at the end of lap 1 on the WRX, the STi would keep on keepin on