from what I read, the Burstbuckers and Pro Burstbuckers have more winds on the slug side than the screw side. These have more winds on the screw side and are said to sound like low wind PAFs, akin to the early Classic57s. I wish I had kept the set I got a long time ago, they were as good or better than most of the flavor of the month stuff that I got sucked into in my early Les Paul Forum days.