I think the WRX should be faster, but not dramatically so. Apparently, it's hard to nail good launches in the Mazda - and the thing has no torque, so passengers would definitely hurt the RX-8's chances, too. I think stock vs. stock they would accelerate to 100mph similarly, with the WRX having a small advantage. The RX-8 is a blast to drive, but I can see why you need to grenade the clutch at high RPM to get it out of the hole. The '06 Rex is a breeze to drive fast, on the other hand.