Some GSD's have "sable" coloration consisting of banded hairs. Its known as the agouti gene. Siberian huskies can have it too. According to the original studbook, all GSD's have a smattering of wolf blood. Von Stephonetz bred a little bit in there. GSD's have a weird mix of genetic influences. They were originally bred to herd sheep, but they are less closely related to breeds like border collies than they are too the mastiff group.
Working lines tend to have the sable coloration more. I tend to think the sables are a bit more wolf like than the black and tans. They do things like regurgitate food for their young. Its a breed I admire, but a lot of them have hip problems, if yours doesn't count yourself really lucky.
A couple weeks ago Westminster Dog Show - LASA APHSO MOST WOLF LIKE. I THOUGHT - NUTS BUT WE HAVE A LASA AND I DOES MAKES SENSE. DID MORE RESEARCH AND MADE MORE SENSE. THEY (RESEARCHERS) ARE REFFERRING TO THE MENTAL, NO WAY THE CONFORMATION. Devoted at a distance. Always there but never "in your face".
Whatever the case dogs are the most diverse mammal on the planet earth.