Telerocker is correct. You have to take wire gauge into consideration, too when it comes to output. The Holydiver's wire is a lot thinner than the VHIIs. Thinner wire has more DC resistance.
As regards DiMarzio vs. BKP: to my ears the high power DiMarzios I tried (Super Distortion, Tone Zone, Breed) all had very dark midrange and a lot of sizzle. The Holydiver has less of both and I feel it is a lot clearer and more articulate. It also has less actual output. If you want something close to an 80s sound but with more output than the Holydiver, look to the Miracle Man, which will give a bit more punch and cut compared to the Holydiver.
Cheers Stephan