I would say that the popularity of the Rottie during the 80s and 90s has allowed for even more inconsistency than the Corso. Yes, the Corso is a young breed with different standards across both sides of the lake!!! But I have seen some great and horrible rotties and the same thing for Corsos. I have owned Rotties and currently own Corsos. My last Rottie was a Von Ross Rottie named Kaiser! What a beast!! It was a great animal and was a very important part of our family. However, I must agree that he was VERY DOMINANT and would challenge the wife constantly. The wife loved him, but she's 1.60 meters (5'1") and about 45 kilos or 110 pounds so the dog was as heavy if not heavier than she was!!! He was smart and trainable! Now to the Corso... I will never go back to Rotties!!! A well bred Corso that comes from good working parents that are sound in temperament and conformation will be the best dog you could possible have. These dogs thrive on company and NEED to live with its humans! They are great with children and with the family and no one in our household has ever had HARD challenges. Of course, as with every dominant breed they will challenge, but never to the level I have experienced with my Rotties. Nevertheless, I must say that an UNSOCIALIZED and aggressive Corso is very dangerous!!! These dogs require lots of socialization from day 1. Our dogs will be playing with the kids, kids friends, etc. and in an instant will become a fierce protector!!!! I've witnessed this many times!!! They are very defense oriented, but will take cues from the master and have an amazing on / off switch!! This is my opinion, and I have had rotties from europe and from the U.S. I love all dogs, and the Rottie as well, but the Corso is by far the best dog I've owned. I've oned from poodles, to labs, to rotties, to schnauzers to Corsos!! I'm sure there are some great rotties out there, and some bad corsos, but i'm talking about my experiences!!! Cheers, ALV