I'm inclined to agree with the AKC statements. They do put on the AKC sanctioned shows, maintain breeding records, etc. The AKC is THE one that sets the standards (physical conformation, etc) for all the breeds. I don't know much about the dog scene, but the same thing takes place in the horse world. There's a grade horse (unknown, unregistered bloodlines, unknown breed) registry, a half Arabian registry and on and on and they serve no purpose other than providing a registry for whatever the owner happens to own. As opposed to all those is the AQHA and other genuine breed registries, and like the AKC, they provide pedigree searches, sanction performance events, they maintain and provide documentation of generations of bloodlines so you have a clue what your buying, for example 5 generations of top notch performance cowhorse breeding indicates your generally getting a cowy athletic colt versus the halter horse bloodlines. Most importantly, they require proof of ancestry, proof of physical requirements, etc, that meet the breed's standards before you can register your mare's colt (or puppy?).
and what's the difference?
The difference is the REAL registrys, dogs, horses, cattle, you name it, "police" their breeds and make sure the breeding stays honest, purebred, etc, (at least as best they can.)