Re: Gibson 500T vs Duncan Custom SH-5 for bridge in SG.
IME the SH-5 was brighter and more even across the spectrum. Had a bit more low thump on my guitars.
500T was a good all around rock pickup. Not as much top end. A bit stronger low mids in my guitars (SG and LP).
500T sounded like a loud 498T, maybe a little better, more even.
SH-5 sounded in between a loud '59 and a loud Pearly Gates.