It depends on the type of performance and the level you desire. Both horsepower and torque need to be taken into consideration along with the power curve. Remember, a lot of us have street cars with 3 speed slush-o-matics and a highway rear gear, so an high rpm race engine is not fit for that use.
The augment cannot be one sided, dan is not going to be rotating the earth with his imaginary 318 build, I don't think that was his intention.