I used another pickup magnet to compare magnetic pull/resistance between the two pickups and they both seemed very similar. As I know the Creamery P-90 has Alnico 2 magnets, then I can only assume that the kit P-90 either has Alnico 2 or 4 magnets, and not ceramic ones, which are much more powerful.
Which leaves me wondering why the inductance of the Creamery is so much more than the kit pup. Assuming they both have 42AWG wire, the kit pup obviously has less turns, but using the ratios of the DCRs to multiply the inductance of the kit pup, that still only gets me to 4.3H, 2.7H short. So maybe the kit pup has 43AWG wire, and even less turns than the DCR suggests? Or maybe it's down to different magnet strengths that my very basic test isn't showing. The kit pup magnets are definitely both shorter than the Creamery ones, which would explain some of it.
I was thinking that the difference in capacitance was down to the Creamery one being hand wound, compared to a more regular machine wound winding of the kit pup. But it may also be down to different wire insulation as well.
One thing I did notice on both kits is that the supplied truss-rod covers are 2-screw standard Gibson types, whilst the kit needs the 3-screw type. Luckily I have a stock of G-style 3-hole truss rod covers!
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