The UK Kennel Club considers the two to be distinct breeds; mating between the two are not eligible for KC registration. The AKC considers Long and Smooth coated chihuahuas to be the same breed. Typically, the breed standard for both the Long and Smooth coat Chihuahuas will be identical except for the description of the coat.Both the Smooth and the Long Coats have their special attractions and are equally easy to keep clean and well-groomed. A clause stating. 'if two dogs are equally good in type, the more diminutive one is preferred' was removed in 2009. . They also both come in various different colors such as brown, black, tan, or white. Chihuahuas can show traits from both Apple Head and Deer Head. 'Deer Head Chihuahuas tend to have better health than Apple Heads, due to their longer noses'.