Oh, and as to wanting a recommendation, rather than just a general EMG Vs BK:
Ceramic Warpig.
Its a real 81-killer. Its got about the same, maybe a little more gain (I got mine after I sold my EMGs on, so I cant directly compare, just compare via other pickups), its got a huge, tight low end, mids are pretty smooth, but growlier and more biting than an 81 (or miracle man), plenty of highs, crystal clarity and more note definition and responsiveness and less compression than an 81, by a fair way.