I agree with what Lynn said. Tucker had a ton of coat as a puppy (he still does) making him appear much larger than he actually was. When Murphy was a puppy, he matured very quickly. He was lean, but broad-like and appeared bulky, he also had a lot of coat. Moby, OTOH, doesn't have much coat, he would look tall and skinny in a show ring. He's not too thin, but because of his height and lack of coat, he looks thin.
Ya gotta put your hands on the dog to know for sure *sometimes*.