I am a long time user and fan of the DD. Probably my favorite along with the PG. I have a few guitars with them.
- Bridge of my #1 Les Paul (1979)
- Bridge & neck of my Silverburst Cadillac
- Also in Jackson Jenna V and DX10
- Also - the Jackson JS32's are very similar to Distortions, IMO.
Distortion: Mids and screaming ceramic highs; Best in darker guitars or for tight ultra bass riffing in down-tuned. Or anything to tear faces off.
Custom: Bass and Screaming Ceramic highs; All around great loud hard rock / metal pickup.
Invader: Bass and mids; Best in long scale Fenders or for thick dark music.
Distortion is Judas Priest (> 1980), Accept, Dokken
Super Distortion is KISS, Iron Maiden
(overall sound-wise, I know they used different things)
It is hot, crunchy AF, and searing in the highs. It is a metal pickup made for medal with serious cut and shred to it.
Distortion is "Chunk"
Custom is "Thump"
It actually cleans up surprisingly well for what it is, but I wouldn't use it straight clean without some chorus or reverb or both.
The Distortion really lets you use (or not) the bass without getting muddy ever. Super tight bottom. You have to be caution of the highs though. Unless you like slicing through like a razor blade.