Originally Posted by rspct

No.

Two pot rears were not standard until MY01 for Oz.

Main differences are (focusing on preformance):
- Bigger turbo
- Bigger injectors actually both WRX and STI had 440cc injectors
- Bigger intercooler
- Forged internals
- Semi-closed deck (i think the standard wrx was open by this stage?)
- More aggressive cams
- Higher redline as a result (8,000 rpm)
- 4.44 gears Only the RA had 4.44. Normal STI had 4.11
- Better centre, front and rear diffs. Centre diff was a higher rater VLSD but the front and rear wernt any stronger just different ratios (4.11) but the rear diff was still a r160. Only STI RA had R180
- Thicker, stiffer dampeners and springs.
- Thicker sway bars.
- Strut brace
- Alloy upper and lower control arms front and back
- Few other suspension bits I am probably missing.

Then there is all your obvious extra wings, suede and pink bits.