i knew all off that stuff already. the guitar that sucks, other than the pinch harmonics, is an old fender(HSS) standard strat(i messed up the neck a long time ago and i am still pissed about it so dont ask). i dont know why they sound so good on that old thing but they do. but the other guitar is an esp mh250 with emg hz h4s. when i bought it i thought they would sound better than the fender but i was wrong. the fender has 21 frets and the pickups have more space between them. the esp has 24 frets and the pickups are alot closer together, limiting where i can pick without hitting one of them. this is just one of my theorys but i hope this info will help you help me.