Ok, so I know that Matthias Jabs used a L90 in his '63 Black Strat with floyd Rose, as well as Accept, Zeno Roth (alot of German dudes huh

) also used an L90. Nuno & Dimebag used the L500,I think.I have searched the internet for specifications but these pu's arent really explained very well everywhere I check. I do seem to 'hear' that all of these Bill Lawrence pu's seem to have a very tight and percussive sound.
I'm specifically interested in knowing the specs and differences between the L90,L90xL, L500 and L500xL. Anyone got experience with theses ?