Wow two of my all-time faves. Both legends, but have to lean towards El Flaco Explosivo, he was just an aboslutely beautiful boxer-puncher who punched with such authority. Deadly in the ring and a real gentleman outside of it. He never lost any of his world titles (in three weight divisions) in the ring and had a great KO record in world title fights too. So in a mythical title fight, definitely picking the Nicaraguan.