You can find the definition of the standards for both on places like akc.org or even on puppyfind.com Both places with also have pictures of both breeds. If you click on the following links and then click on the picture it will take you to a few pictures of each breed.
http://www.puppyfind.com/breed/?bree...3Ds%26page%3D1 http://www.puppyfind.com/breed/?bree...3Dy%26page%3D1
There are a few Yorkies out there that look like Silkies and a few Silkies that look like Yorkies. You just need to check out some pups of both kinds along with their parents and find one that fits you best.
