technically speaking mga kuya....
SIgnature pick-ups like duncans, ibanez, di'marzio and etc.... are all pick-ups..... what they differ is the character of the tone.... now what it relates to winding and materials used? they differ because they are using thin claded copper wires for rewinding.... an example is yung headphone wires... kung makikita niyo yung wires ng stereo may kulay.... that does not make any flavor or anything that makes a good sounding pick up at all..... its a covering(clad) that protects against aging and shorting on the other copper wires....
to summarize it..... its the design of the manufacturer that matters.... kaya nga may duncan design pickups... di'marzio too..... they specify their own designs..... the number of turns, gauge of the wire.... the magnet......
so kung papagawa ka..... make sure na talagang alam niya yung gagawin at hindi lang basta trabaho.... it a very delicate process... because dun magdedepende ang tunog ng gitara mo.... at yung quality ng sound.... you should provide your own tone specification para alam ng magrerewind yun....
about magnet..... kahit hindi mo madefine ang polarity ng magnet... it doesnt mean na kalat kalat po..... hindi mo lang malalaman kung saan pero kung kukunin yung centroid ng magnet (either deformed or basag) ayun yung gitna tapos andun na yung north and south..... sa magkabilang side.... hindi nga lang ganung kaaus kasi nga deformed....