Re: Good ol' Black winter vs Nazgul vs Pegasus
They way I understand it, the Nazgul is made mostly for modern death metal stuff, very bottom/chug-heavy. Maybe Meshuggah and stuff. Don't know if it's good for clean or leads.
To me, the Pegasus seems to go more in the heavy rock direction, bass-heavy and loud, but not too aggressive so it doesn't push the guitar too much to the fore. Just my impression. Seems to be lower on mids, which I don't like, because for all the cutting I need lots of mids.
In contrast, the Black Winter is very bright sounding. The Nazgul seems to have a lower-string focus, I'd guess they sell lots of 7- and 8-strings. Probably best if you want thunder. By aiming for black metal, the BW is the opposite, as that genre is typically dominated by mids and highs and depends more on the upper strings. That gives them an almost acoustic quality compared to most high output pickups. The mids really cut through, which makes them interesting for more traditional soloists (dare I say Gary Moore). Generally, it seems a bit on the conservative side to me, compared to the others it still has a little bit of vintage humbucker vibe. That all is probably why even non-extreme-metal players seem to like them.
edit: here's a nice demo that shows how nice and friendly the BW can be.