Allow me to break down to some degree as to how this would transpire if it happened:
- unless you have every pickup at your personal disposal, you're going to need to communicate with others to temporarily acquire (borrow) said pickups
- the above will take a good amount of time as these people will need to box up & ship their pickups; who knows how long that will take
Once you finally acquire said pickups:
- you'll need to hone your recording skills so you can get a quality and consistent result for each test clip
- you'll have to pick one guitar to test on
- you'll prolly pick some sort of rhythm and/or solo lines that are repeatable (consistency).
- you'll have to set up your test rig including microphone(s) (if not going direct)
For the actual test:
- you'll record the 1st pickup, then possibly have to cut strings (depends on things as well as how consistent you want to be); if you don't
cut strings, then technically you're not being consistent (fresh set every clip would be optimal)
- you'll have to break out the soldering iron, disconnect the pickup, slap in the next pickup and solder it up, then possibly (as above) re-string and tune up
- repeat these steps for each pickup
Once done recording:
- you'll need to use a limiter or some plugin to normalize all of your clilps so they are close in volume level (consistency)
- you'll need to export all of these to .mp3 (320kbps is best - although .mp3s for a listening test is sort of a joke, should be uncompressed .wav or the like)
- you'll need to post each of these clips to Soundcloud or whatever website
- you'll need to post each clip on the forum and type up a long explanation of whatever "system" you used to test, etc...
The end result?
A hell of a lot of work for the "reward" of (most probable) "well, there's a very slight difference between the models".
And a lot of arguing from various posters about your method, about the tonal quality, about the slight differences, etc you name it.