Well the engine is in no way more reliable. :rofl It has the beefy ass STi 6spd designed by Porsche which can hold 600+hp. Compare this to the WRX 5spd which has been known to fail on stock power levels.
It has 300hp stock compared to 227hp stock WRX.
Thicker axles.
Same shitty wheel bearings.
Brembo’s.
Basically just look up STi and WRX. See the differences yourself.