A breed comparer to compare.. what? You mean like this? http://www.about-dogs.com/breed_table.htm That's the only thing I can think of that gives an appropriate chart type thing of info comparing breeds.
minniyar i noticed a few inaccuracies also. like their description of the boston terriers. everyone i work with has these little guys and the breed chart was inaccurate on everrything except they have short hair.
You may want to take a look at these links where a breed is selected based on your answers to various dog-related questions: http://www.dogbreedinfo.com/search.htm http://animal.discovery.com/guides/dogs/selector/selector.jsp http://selectsmart.com/beta_dog/#appearance http://www.ivillage.com/pets/tools/breedselector/questions/dog/size