You might also argue that Saddler was vastly more powerful then Aaron, stronger and a higher level of pedigree. He beat better men, was dirtier (in the ring) and just as aggressive and durable I think it’s a 50/50 sort of fight personally:
Pryor was a good 10 or so pounds heavier, so I have a hard time believing he would’ve been at a disadvantage in strength or power. He was never at any major physical disadvantage in a career spent fighting larger men than Saddler.
I think Saddler mugs him for his lunch money and wins a very dirty/controversial/highly disputed decision.
Saddler was the stringbean of his time and that gave him an advantage to his challengers at 126 pounds. When he tried to fight top guys who were in the next weight division like George Araugo, Del Flanagan, Paddy DeMarco, Flash Elorde, Joey Lopes, and Armand Savoie, he had tougher going. Against Arguello, he would be facing a guy who was even taller than he was, so much of what made Sandy so effective as a featherweight would be neutralized. I take the point that he was as tough as nails and devastating inside, but Arguello was an all-around great fighter, almost unbeatable at featherweight, and I think he would be able to find a way to handle Sandy.
This is a tough call, my first thought was Saddler , I think he was the greater fighter at 126. I can't see how anyone believes this would be an easy win for Alexis. I can see Arguello fading in the later rounds losing a close decision .