Corsos and Rotties are very different!! Similarities in looks?? A corso that looks like a rottie is not a true corso. http://www.planfood.com/saxellum/uk/index.htm Renzo's corsos both show and work, his main stud Boris was a true example of a corso! Notice how his dogs don't look like Rott or boxer, bullmastiff or even neo. They can only be corsos.