With enough octane (or lack of timing, etc), the 01 should slow down when lean before getting into nasty detonation we see now. Now the motor is fastest while slightly detonating. based on my dyno work on the ’99, the engine was best when ‘right’.. slightly lean made less power.
And I agree Chris.. on long tracks, the 01 should be better. But even at DKC( fairly fast) and at S-nats, they are pretty damn close.