I hope this doesn't turn ugly like the other threads i've read. But it seems like some posters didn't learn from past experiences to just answer THE QUESTION THAT WAS ASKED. Not go into "What you think is reputable or not..."...no offense to anyone.
Now correct me if I'm wrong Phoebe_M.....when you say character are you talking about personality wise....like "Are Parti's nicer than standard yorkies?"
& I'm not mind reader or anything, but it seems the OP is asking questions about Biewers, goldens & Chocolates because she has an interest in them. So we are not here to scare her away from them....or make her feel that they're Mutations. Let her research & be the judge of that on her own. She asked a simple question....so why give an excessive answer?