a couple of years ago me and my mate both had aerox's, both had malossi variators and i had the yasuni R and he had the hebo new performer 2004 pipe. both had relatively the same top end and acceleration was very much the same. the only difference was the sound, both gave nice powerful metallic sounds as opposed to the trumpet sounds coming from other mates' tecnigas/leovince pipes. but in my opinion i prefered my mates hebo because of how it looks and its sound was slightly raspier. hope that helps!