XX1WRX1XX replied: "My favorite interior is the 02 wrx-best seats by far as they ACTUALLY hold you in. Least favorite interior is the STI interior from any year(the blue is...a little much and the 04 STI steering wheel looks like a plastic toy). Here's just a few things off the top of my head(definitely NOT all of them): 02: WRX arrives in U.S. and remains a 2.0 liter until 2006 when it received the 2.5 liter engine. Drive-by-cable throttle. 03: Different brakes? lol 04: New body style (agreed on the ridonkulously large hoodscoop). STI arrives on U.S. soil with the new DCCD transmission and the same heavy control arms as the 02-03 sedan design(wagons of all years between 02 and 07 had slightly narrower front tract). Keeps 5x100 bolt pattern. Most Subarus receive a drive-by-wire throttle. 05: STI receives lightweight control arms and 5x114.3 bolt pattern. Aesthetically almost the same as 04. 06: New, aggressive, body style. STI remains mechanically similar power-wise. WRX receives the 2.5 liter block (same as the STI even though slightly different engine code). 07: Basically the same as 06 08:New chassis. New body style. STI only comes in wagon trim on the Impreza in the USDM. As for your choice: If you're just going to drive it normally I wouldn't waste the money and insurance with the STI. I drive an 02 wrx wagon and with a few simple modifications and a tune by HB Speed it has 30 more hp and 40 more lbft torque than the stock STI. The 02 wrx has drive-by-cable throttle which feels much more direct and not laggy like the drive-by-wire after 03. The 02 wrx has better seats than any other Impreza IMO. If you want the best value for your daily driver and not astronomical insurance I would go with an 02 or 03 wrx (also the cops don't bug you in a wagon)."