I think that is the difference between them...the Biewers were developed by Mr and Mrs Biewer in Germany. They can't be registered with the AKC, whereas the parti yorkies are. The more I read the more I am confused...
Are they not all yorkies..period? Not trying to start a debate just saying I am confused...BTW my Jersey is a Biewer. The parti yorkies are not readily available here...There are two breeders in Canada that breed the parti, both in Alberta. Not too many Biewer breeders here either...