I did have my jazz in those configurations for coil selections but went to series/parallel for each and a phase reverse for the the bridge… I personally didn’t find coil selection all that useful but thats me. It didn’t matter what mode they were in, i just haven’t been happy with it… part of it may just be because its fretless.
Your probably right about the comparison of Wilkinson to your cheap blank mm pickup, I tried those cheap ones on a couple projects and that lead me to realize that placement is key for the mm… at least for the sound I like. I was really happy with the shorty’s sound when i was done, it was very similar to a full scale mm knockoff that i have (and love) with an added split coil.
I built a test bass that I can put pickups anywhere between the neck and bridge and that helps when im figuring out where good placements are for some of my builds and to compare pickups.
I used it to figure out placements for this double split P… nice and full sounding!!
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And my test bass(life has hit hard so I haven’t been tinkering lately)
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