I love Google Maps. Anytime I am heading somewhere I've never been, I look up the route on Google Maps and figure out the best route, how long it will take, etc. I love that I can drag the blue line--indicating the route--and make a new, more interesting route just like that (snaps fingers).
As far as I can tell the difference is that it takes hills and traffic in to account (attempting to route around them both). As before, that blue highlighted route is adjustable, just grab onto it with your mouse and drag it where you want to go.