Hmmmm,that's a tough one because I do see Yorkie features but the color throws me off some.
So,she is saying that this dam is a (100%) Yorkie and (100%) Biewer mix?? I would think the Biewer breeders, especially the ones that have experience with the "Splitters",would be able to answer this for you...or atleast have a better idea than what I do. Her color looks more like a "Yorktese" (Maltese/Yorkie mix). However,I don't really see Maltese in her. The picture of the puppy does look like she will end up looking like the mom. I wish I knew what exactly to say....sorry that I have not been more help to you. The one thing that I can say is if you were looking for the look of a Biewer, she will not look like that. There are some great Biewer breeeders that are members of YorkieTalk if you decide to go that route.
Good luck with your puppy search!
Tammy