Using smrobs most excellent link...here's the definition or Rabicano vs. Sabino...
Rabicano: Rabicano is a pattern that is often confused with true dark-headed roan. The rabicano gene, however, is entirely seperate from the roan gene, though it does create a pattern of white hairs that can be similar to roan. It is usually manifested as a sprinkling of white hairs radiating out from a horse's flank, sometimes spreading across the barrel and onto the shoulder. Rabicanos also have a white-topped tail, known as a coon tail or skunk tail. There is some thought that rabicano may be tied to or somehow related to sabino as the rabicano pattern is often found in conjunction with sabino. Rabicano can act an any coat color.
Sabino is a pattern that comes in many forms. In its minimal form, it only manifests itself as small socks and a star or blaze, if that. More extreme sabinos will have white patches, often with roaned edges, creeeping up their sides from the underside of the belly. The most extreme sabinos will look entirely white or almost so, often retaining a few patches of color along their toplines, particularly on the ears or in the mane.
Jakes white hairs are throughout his body...not just around his flank. So I think Rabicano is out imho. And he's definitely got that Pangare thing going on that smrobs previously showed us.
The first pic is Rabicano, the 2nd is Sabino (haven't figured out how to imbed images yet within what I type)