I just realized I didn't post the difference lol...here's what I found on:
http://yorkshireterriersofcalaryn.com/Biewers.aspx The Biewer is becomming widely recognized as a separate breed from the standard Yorkshire Terrier. Biewers are sometimes confused with tri-colored or Parti Yorkies. The difference is that the Biewer is bred to a strict standard, the colors have a set pattern and they are a recognized rare breed. Many tri or parti Yorkies have white colors combined with other colors that appear random while others appear very similar to Biewer markings. Currently Parti Yorkies do not have a written standard and are considered a color variation of the Yorkshire Terrier and they are not recognized by AKC, nor considered a rare breed at this time. Parti Yorkies usually have a cropped tail, while the Biewer standard specifies long tail held higher than the back.