I'm getting old and my memory of things that should be solid in my mind is failing me.
So if we look at SD pups without considering their respective magnets or pole pieces (only looking at the actual winds), it is my recollection that (please correct me if I'm wrong, and please add other pups that you are sure about):
Distortion bridge = JB, =Invader;
Custom = C5=CC=C8, =Full Shred;
Distortion neck =Jazz.
So if we look at SD pups without considering their respective magnets or pole pieces (only looking at the actual winds), it is my recollection that (please correct me if I'm wrong, and please add other pups that you are sure about):
Distortion bridge = JB, =Invader;
Custom = C5=CC=C8, =Full Shred;
Distortion neck =Jazz.