There’s a lot of misinformation and contradictory info out there about the pickups. I bought a BL USA one on eBay out of a 1994 washburn and it’s a cool pickup, totally different from anything else I have. Very bright and cutting top end. A bit too scratchy and ‘single coil like’ with some amps, but I’m also using it in an alder strat with no tone knob.
Very hifi sounding which gives it kind of a scooped feel. Very tight bottom end. Very harmonically rich. I’m not really going for a Dime tone but my first thoughts were it reminds me a lot of Dime since harmonics are just so damn easy, and it sounds very tight.
I did some research online when I bought it and the original pickups are the Bill Lawrence USA ones. Bill (real name Willi Lorenz Stitch) fell out with his business partner and left. BL USA kept making the pickups and Bill went off and among other things, kept making the L500 pickups. I think he also made them in Germany at some point under a different brand name that I don’t remember.
The Bill & Becky ones I think use Alnico magnets now, so slightly different from the BL USA. I don’t know if the BL USA ones have changed at all over the years.
There are plenty of posts out there saying they sound the same, and plenty saying they sound totally different. Some prefer one and some prefer the other. All I can figure is that one or both companies must have had iffy quality control at some point, since I read of complaints of bad sounding or defective pickups from both. Luckily both are pretty cheap compared to most other aftermarket pickup manufacturers so it wouldn’t be that expensive to buy one of each.
Fair warning, they’re very thick pickups and might not fit in something like an Ibanez without deepening the pickup routes.
The dc resistance is pretty low (I think my L500XL measured like 12k or something) but it’s the highest output pickup I have.