Trims?
Basically just regular WRX-STi and WRX-STi Prodrive Style. The Prodrive Style gets blue guages, a different bumper, a differrent spoiler, different sideskirts, and of course a badge. No other differences as far as specs or engine etc goes...
Versions/Types?
STi RA Spec C
The "race ready" STi, with no radio, no ac, no PW, no PL, only comes in white, no sound-deadining material- etc. No creature comfort or luxury items.
But what you do get is a more highly tuned EJ20, a stiffer suspension, adjustable center diff and cable-type front/rear diffs. You also lose a couple hundred pounds of weight...
Rally ready, just throw in a cage and your good to go for Group N...
You have WRX-STi