Honestly it’s a good matchup, Valdez was good but I’m not sure he’s ever been at such a size disadvantage like he is here. Nino is used to being the bigger man but Carnera was nearly 50 pounds bigger and 3 inches taller with a lot more muscle. Even a murderous puncher like Baer struggled to take out a one ankled Carnera, so I doubt Nino would. I’d say Primo overcomes some early adversity and bullies Nino
Primo jabs, uppercuts and clinches a decision. Valdez was a good hitter but I doubt he can rock Primo consistently enough to nulify him.