Some of the things I like about the STI over the wrx version that aren't related to power are as follows.
The 6 spd tranny makes the car MUCH easier to drive around town in a civil and smooth manner. There is always a gear that works. I found the 5 spd to be a little awkward in certain situations. Also the 6 spd is a crisper cleaner shifting tranny even after a STS was mounted to both of them. Also the Sti clutch is actually easier to push.
The driver adjustable center differential (which can now be ordered on the rex) makes the car ALLOT more user friendly in multiple situations. IE when you "lock" the diff on water covered rutted roads there is a drastic reductions in wandering through the puddles, also when the diff is putt on a full rear bias the car doesn't bob back and forth across the ruts on hard launches into corners.
The LSD also make for better control in the snow. I was unimpressed with the wrx, but the sti (even on horrible summer tires I am wearing out) has a more solid and predicted feel. Especially with the CD locked.
The suspension is better, but could still benefit from the same treatment.
The brakes are allot better, but I wasn't particularly disappointed with the rex, I think either is good for DD and some autox time. There is a fare amount less brake fade after a few hot laps in the sti.
The STI styling seems to add enough aggressiveness to set itself apart from a standard impreza.
I am sure there is a little more, but that's what I come up with, performance is of course over and above these things. (including a more upgradable turbo layout and engine design.)
AEM CAI, Perrin ELH wrapped, Catted Downpipe, Stage II XPT tune, K4RT30Y STS, lip, shark fin
Last edited by ratfink; 03-02-2010 at 05:07 PM.
Reason: laptop keyboard