50/60B bridge pickup is a custom version of the 50/60T featuring a blend of materials used in the 50B and 60T, while having similarities of the 50B broadcaster, it’s a very versatile pickup that has a little more of the harmonic hair on the notes vs the 50/60T.
JL neck pickup is a lower wound version made for Julian Lage, which replicates the neck pickup in his original 1954 Tele. He is currently using the JL in two of his Nachocaster Teles. The JL has a bit more scooped mids and has pronounced high and low frequencies.