I personally feel that AKC is the best one to go with. Many people will not buy a Yorkie unless it is AKC registered. I bought one that was AKC and one that was APR. It just depends on what you plan on doing with the dogs. Such as Breeding, Selling things like that. AKC has different requirements compared to the other ones. Actually not one Registry is alike. Research them. AKC's website is
www.akc.org.