Probably NO difference, depending upon how the terms are being used. Pureblood and fullblood are often the same. Purebred usually connotates being "bred up" from a different breed through an "up-breeding" process, while pure and/or fullblood usually indicates an animal that is of 100% of the breed in question. In Braunvieh, the 100% animals were either imported from Europe and/or breed from animals that were imported at one time, rather than crossed on different breeds.
> I am trying to understand the
> difference between a full blood
> Braunvieh and a pure blood? Just
> what exactly is the difference?