Re: To coil tap or series/ parallel...that is the question. Pegasus/ Sentient...
IMO, split gives more of a typical single coil tone while parallel gives more of an in-between quack. When I want that quack, I can get it by running both pickups split. In this case, the two coils are running parallel and their relative positions give a more genuine in-between sound.
My $0.02, IMHO, FWIW, YMMV, etc.