Most people outside of AKC dog shows and breeders are not familiar with either of these breeds because of their limited numbers in the US.
These two breeds(Cane Corso and Presa Canario) are quite expensive. They are the ultimate protection dogs. However, I would not want either of these breeds around my home or family.
Most people do not understand that ALL canines were originally bred from wolves. They are all natural born killers in their DNA. Humans have selected bred them over the last 5000 years to develop different characteristics. All hounds were bred to hunt. All terriers were bred to kill vermin. Shepards were bred to defend the flock from predators. However, if we humans stop feeding them, they will fend for themselves.
Please see post 50, I missed you in the included. As a breeder, I believe that you would be interested.