Although the EMG-85 has more measurable output than the 81, its frequency response and string interface are different. The 85 uses two Alnico magnet loaded coils with a wide aperture to maintain a beefy lowend and a fatter top end. Because of a more natural tone, it works great as a rhythm and blues pickup because it has loads of output but isn"t muddy. Itís a perfect choice as a rhythm pickup in combination with an 81 in the bridge, which is the same pickup combination used by Zakk Wylde.