What are the differences between the different kind of Alembic P-ups?
There are basically two types that Alembic use, Single Coils on Series Instruments, and Humcancelling, which are not the same as humbucking, on Non-Series Instruments.
More detail is contained in this link here.
https://club.alembicguitars.com/Images/16271/18779.html?1117034562 (https://club.alembicguitars.com/index.php?topic=293)
I hope that gives you some clarity.
Jazzyvee