Here is a website that explains the differences between a yorkie, silky, and australian terrier.
http://silkyterrierclubofamerica.org/comparison.htm http://www.geocities.com/Heartland/R...ron-links.html
Here are 2 pics of silkies and then 2 of yorkies. As you can notice the most distinguished difference is the head (skull, ears, muzzle) and the body, silkies have well muscled and structered bodies and are longer then they are high unlike a yorkie who is as long as they are in height and bone and body structure is not heavy and sturdy but rather light and more fragile.