German Rottweilers are said to be shorter, stockier and have a bigger blockier head
American Rottweilers on the other hand are said to be taller and leggier without as blocky of a head
The truth is that there is no difference between an American or a German Rottweiler. The only difference being their place of birth, German born Rotts are German, American born Rotts are American. The breed standard that the American Kennel Club (AKC) has established for Rottweilers is almost exactly similar to that of the Allgemeiner Deutscher Rottweiler-Klub (the Rottweiler Club of Germany). The only difference is that the AKC's standard is a few centimeters different than that set by the ADRK.