Not sure this has been documented yet, so here's one that we may want for the Tbird sticky.
Spotting a Gibson Thunderbird Reissue Pickup vs an Epiphone Thunderbird 760 ProBucker Pickup
Epiphone on the left, Gibson on the right - Eppi is nickel Gibby is chrome, Eppi has larger screw holes, both pickups are nominally the same dimensions.
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Epiphone on Left, Gibson on the Right - very different on the backside, Eppi has three holes in line on the left and one on the right, much longer solder seams, is stamped with "Epiphone USA" and has "HB-C" sticker indicating this is a Bridge pickup (neck would read HN-C). By contrast, the Gibson pickup has its wire pass through holes on the right and they are set back about three screw hole diameters from the screw hole. The Gibson pickup housing solder points are much smaller and in four places vs the two on the Eppi. Gibson also chose to bring both thin black coil leads outside the housing to connect to the main pickup lead vs Eppi only bringing one out. Gibson wrapped the north coil lead solder joint in electrical tape (which promptly fell off when I touched it, should have been shrink wrapped). Gibson does not offer a neck vs bridge option. The Eppi bridge pickup measured at 9.42ohms (8.39ohms for the neck pickup) the Gibson pickup measured at 8.48ohms.
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Close up of the Epiphone wiring - fairly neat, secure and robust solder job.
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Close up of Gibson wiring - looks secure on the south or ground side but the north or hot side looks relatively frail. Tape fell off and I'm a bit concerned about the potential for thin black insulation on the hot wire to be cut into by the pickup housing (I'll be installing shrink wrap on the wire solder joint and putting a dab of silicone caulking in the pass through hole to act as a rubber grommet).
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Big difference on wire type used as well - for those that don't want to pull their pickups out to see what they have, you might be able to spot the difference in the control cavity of the bass. The Gibson wire is shown on top and Epiphone on the bottom - note the Epiphone wire is a bit larger gauge, it has an insulating black vinyl wrap over the grounding mesh, thick pull back cloth wrap under the mesh and a multi strand hot core. The Gibson wire has no outer wrap to prevent unwanted grounding, the overall wire size is smaller, the pull back cloth insulation is thinner, the hot multi strand appears to be about the same size as the Epiphone.
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It would be wonderful if somebody with ChinaBuckers (EY Humbuckers) could post similar photos so we can spot the differences in those vs the Gibby and Eppi offerings. All my ChinaBuckers are installed so they're a bit more difficult to photograph and measure the resistance on.