Really no change in tone to my knowledge. The pup is slanted just to facilitate the extra frets on the high end of the guitar. I asked Bernie if we had to angle the pup and he said that is just the way he has to do it if I want 27 frets. The highest end of the neck is ridiculous, by the way. It is like... hummingbird high in standard tuning. I can comfortably say I will never use it.