The biggest difference between the two is the drivetrain on the Sti, its much more advanced then what is found on the standerd WRX allowing it handle different terrains, so for most people who will only ever be driving it from point a to point b other then having that badge on the back of the car and a wide body kit (which will be standerd on the 2011 wrx) there is very little difference except for oh yea price. So yes, i stand by my statement that the new wrx is almost an STI, and the rest of you fan boys can continue to dry hump a badge, ill keep my 10 grand