Here are the list of amazing sites which will help users to compare various maps provided by Yahoo,Bing and Google and all of them at a time and under one roof which will help those who are using online maps how a same key word or place is show in different services and will helping user in selecting the service he likes most and all that with out leaving a single site instead of going from one site to other.
These two sites here helps you compare Bing, Yahoo and Google Maps, side-by-side.
Not satisfied here then there is more ….
Compare 8 different online mapping services with Flash Earth.
Included here are maps from Google, Yahoo, Ask, MSN, NASA, and OpenLayers. The well-designed interface allows you to easily switch between services; you can sample each one’s particular representation of satellite and aerial imagery and see if it works for you. This is a great way to compare maps quickly.
Using these services you can also change interface between Map,Hybrid and satellite images.