Quote Originally Posted by string
The car with the shorter final drive will most likely give a smaller read-out.

Inertial loads will require more power to accelerate as you shorten the run time. By increasing relative wheel torque (to your friend for example) you will shorten the run time, thus increasing angular acceleration on all rotating parts in the engine, incuring a greater (engine) torque loss.

Conclusion: Dyno figures are a very general measure of power output. Don't take them to heart, since in this case, the car with the lowest 'read-out' will be quicker in most likely, every situation (all else equal).
lol, i think you're totally off the mark mate.