I run the Novarossi and my team mate runs the OS and let me tell you that we are equal power wise all over the circuit (acceleration and top end). The only difference that I can tell is that I get a little more fuel milage with the Novarossi than the OS. Probably around 20 seconds and so about a lap at our track and in Qualifying that's made the difference in the past. He's run out of fuel on the last lap before when the track is nice and grippy and the temp is high.