OK, so the wire gauge is the same. The baseplates are made out of what look like the same material. Maybe the slugs and screws are significantly different alloys? I don't see how it could be drastically different.
The way the wire is put on the bobbin matters. Turns per layer, tension, etc.
starting at 54:30
Optical guitar pickups? I know nothing about this...
Optical pickups are a fairly recent development that work by sensing the interruption of a light beam by a vibrating string. The light source is usually a LED, and the detector is a photodiode or phototransistor.[9] These pickups are completely resistant to magnetic or electric interference and also have a very broad and flat frequency response, unlike magnetic pickups.
Optical pickup guitars were first shown at the 1969 NAMM in Chicago, by Ron Hoag.[10]
In 2000, Christopher Willcox, founder of LightWave Systems, unveiled a new beta technology for an optical pickup system using infrared light. In May 2001, LightWave Systems released their second generation pickup, dubbed the "S2." The S2 featured LightWave Systems' monolithic bridge, six-channel motherboard, and a host of other improvements, making the technology more practical for use in both live and recording studio settings.[11]
I'm going to put on my product engineering hat for a second and look at this. Assuming the wire is the same gauge copper...
...both companies use machines to wind the pickups. I am also going predict that the tensions are similar, there is probably a small range of tensions that work well for consistently winding pickups, if you wind it too loose it would be sloppy, too tight and you would often break the thin wire during the proces.
No, part tolerance drift would be more like a 78 that has a few more or less turns, slightly thicker mean average wire thickness and resistance, etc.So, taking the religion out of it and reducing it to the technology, you will have a pickup that is similar to a 78, within some "tolerance" range, kinda like old Marshalls where the component values would drift...
I'm not sure you know what I meant, forgive me if this sounds condescending but did you know that within 42AWG that you then have it sorted into min-nom (minimal to nominal) and nom-max (nominal to maximum). You have to think of these as like, two subsets of 42AWG. There are some PAF types made with min-nom and others made with nom-max. It's a trade secret which ones use which wire, of course.No hard feelings at all Frank.
As far as the wire goes, the OP said it was the same gauge, so everyone using it has to deal with the tolerances.