Everything is relative, the subaru might have less torque, and less weight, but id guess the gear sets are also a lot smaller. So to fairly compare, you would have to do a "unit-pressure" and "surface-speed" calculation for the gear set in question. You might find the power density transmitted through the subaru gear set higher then yours.
Now stop and think about racing boats, 1200+ HP through a roughly 6" diameter "ring" gear. You want to talk to guys who can design a production gear set that handles incredible power density.....they are it. Not to mention they spend a lot of time at WOT...not cruising down the highway. Just some things to think about.