Just curious. After a wee bit of googling, it looks like there would only be three or four types of badgers globally that are/could be used for shaving brushes. And, from reading, the quality of badger hair seems to be largely a question of what part of the badger the hair comes from.
As to boar, there are all kinds of hog breeds worldwide. Which types yield the hair for boar brushes? Are the different qualities of hair a function of the breed or a function of where on the hog the hair comes from?