Both the WRX and the 370Z weigh 3200 lbs. (via Subaru.com and Wikipedia)
The Z makes 320hp, the WRX 265.
Z has 6-speed, WRX 5-speed.
Z driveline losses-2wheels, WRX-4 wheels at speed
The math for how the WRX "pulls hard" on a Z eludes me. And though I am deficient in many areas...I have a bit of math under my belt.
I will give it to you that VQ powered cars don't "feel" fast, if you're used to a forced induction surge, but the new Z is a decent performer, my friends.