LaMotta is way to big the guy was a huge middleweight and would eat every shot Duran threw. Duran is the greater fighter but he would take a beating against Jake.
If both of these men were naturaly roughly the same size maybe at 154 I would say Duran TKO 10 in a very violent contest. Seeing as how Lamotta was a natural 160 and Duran a natural 140 I give an edge to Jake as long as he was trained properly and goes in with a more conservative fight plan. However if he went into Duran like he tried to get into Robinson, Duran would chew him up even at 140. Too much speed and accuracy, and even at 20 pounds lighter Duran still hit plenty hard enough to turn Lamotta's face into chopped meat just like Ray Robinson did on February 14, 1952.
