The DiMarzio 'The Breed' Humbucker was developed for Steve Vai to produce a more classic PAF humbucker tone than his usual favourite Evolution humbuckers which has a very modern tone.
The Breed is really a middle ground between classic and modern tones: still far hotter than a vintage voiced PAF style humbucker, The Breed balances the hot output with a slightly rounded tone that's warmer and less aggressive than the Evolution. The result is a great neck pickup to partner with a modern voiced bridge pickup for a variety of high output tones. The bridge version offers up medium/high output which cleans up really well with either the volume control or your attack but also crunches up nicely when pushed hard, designed with 25.5" scale guitars in mind this pickup has a very warm tone. This is the F Spaced version that is designed to fit guitars with Floyd Rose or Fender style tremolo systems.
Here's what DiMarzio say about the Breed Neck Humbucker Pickup
If you're a fan of Steve Vai, you've probably seen him playing an Ibanez Jem guitar with the word "Pogo" taped on the face. Steve wanted one of his instruments to have a fat, classic humbucker sound to contrast with the hotter, screaming Evolution-equipped guitars. These are the pickups we developed for him. The neck pickup is a bit louder and fatter-sounding than the PAF Pro pickups that Steve used on his earliest Jems. The bridge pickup is not as hot as the Evolution, but it's got a warm and punchy mid-range coupled with a fat low end that rolls off before it can get muddy. Harmonics are easy to get, and the 4-conductor wiring enables cool "notch tone" coil-splitting.