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There is one Australian brand what is far the best in all aspects - Kinman Pickups.
500k, ~20% log taper - not easy to find...) pots for both Volume & Tone. 1m is ok too, but never 250k or 300k. Never linear taper - it is "to...
Many, even most pickups have poles/studs or screws through, so are sensitive on noise from the bottom too. If coil sides are open - sides are...
No, very different guitars. All (except the neck) is principle different. I mean body, bridge, pickups, electronics.
1. Frets in tune. 2. Sensitivity/vibrance (if it is impossible to find the reason and animate it). All other is less important.
There is no one concrete answer to this question. It depends on your pickup's LCR (inductance, capacitance, resistance) parameters, guitar...