Gotta go with Michael on this one. Griffith was great at tracking down elusive guys like Dupas, Archer, and Rodriguez, but Nunn was a better or at least a flashier offensive machine than any of those three. Throw in that the fight is above Emile's best weight and the edges for Nunn become even more pronounced. Also, Griffith was enough of a threat to motivate Nunn, who fought to the level of his opposition.