The Rottie can be very rank driven I had 3 gen for 16 years but many dogs are if given the chance the Rottie probably more than most but the pets and show dogs can be like labs. The larger mastiffs are usually bred soft for easier safer handling most people don't have the nerve or backbone to deal with a rank driven dog that out weights them. I don't think the neo is used that much due to health issues but they bring size. I think the rank driven dogs would have more backbone in a fight than a dog very submissive with there family because they don;t submit but balance is best to much rank may also be an insecurity.