Difference Between Rott Weilers. An adult rottweiler is smaller than a boerboel. Gsds, meanwhile, are much more athletic looking.
The only difference between an american rottweiler and a german rottweiler is that the former are born in north america and the latter are born in germany. The rottweiler originated from germany among roman cattle dogs. So the american rottweiler was born in america, not in germany.