Probably the Keed. Napoles was the more aesthetically pleasing fighter to watch, but Gavilan was a bigger man, faster, stronger, and tougher.
Kid Gavilan by decision. Gavilan has already fought and beaten very talented fighters like Ike Williams, Billy Graham, Johnny Bratton, and even gave a prime SRR one of his toughest, closest fights. I have no doubt that he would be able to beat Napoles convincingly in a great exciting fight.