I guess then the biggest factor how pickups will sound is in the fact in the wood selection.My Hellraiser 7-FR is made of mahogany body/top quilted maple with maple neck with rosewood fretboard.So I think tone if overall balanced then dark or middy,or whatever you like to call it.
And beside pickups as we all know,how you adjust your amp,preamp,pedals will make sound drastically different.
I only heard just good about Bare Knuckles,do not know how to describe it exactly but to me all they got a more classic sound mix with modern which is good by the way.So for what I have heard know it will be a 2 months of actively listening clips and comment of folks they can not chugga that much at all.But I came from old-school music(my father was a hard rock drummer for almost all his life),I listened a lot hard rock 70thies,later 80thies heavy metal and neoclassical metal,in 90thies especially Bruce Dickinson more modern heavy sound.Then in 00th I start listening power/progressive music...
Sorry for talking about myself too much..I just wanna say that if you like me and you want cover different varieties of sounds I never heard better pickups than Bare Knuckles to be honest...They can not sound too much modern,but they are very very versatile...So me personally I would sacrifice a little tightness in order for versatility.
I just miss very much all those ("older")sounds,I just can`t stand to sound always modern (read the same)...I will buy it for sure but for know not sure which. :)
Too many good pickups to choose. 8)
If you want exclusively mind blasting chugga tones,use active pickups for sure.No one passive can`t match with them in that sound.
Cheers bro! \m/