To be fair, the fight you say besides, is a better win than SRL had on his resume all things considered. Against Hearns (his best win imo) SRL had to comeback in a fight he was clearly losing, against a fading Hearns. Granted, he is of championship pedigree, and showed it, but it was a tough fight for him, one he was close to losing. By contrast, Duran bossed the fight against that same fighter who beat Hearns, and in my book, was never behind on the cards. This was against one of the best WW of all time, while he himself was a natural LW. McGrain asked this question a long time ago, what other LW in history do you see beating that SRL as Duran did? Then ask yourself that in the reverse, what other WW in history do you see beating that Hearns? The list was small, almost non-existent for the former, while the later produced many more viable candidates, though not many again. I think that underscores the significance of that win, and just how valuable it was. Then when you factor in other wins, like DeJesus and Ken B., and then Pipino and Palomino, title reign of domination which is far longer than SRL reigned, the case becomes better imo. That isn't even getting into fights with Barkley, which again, despite what you think of Iran, are a lot of former LWs, who are 37 years old beating him that night? Which win of SRL has had such obstacles stacked against him? Hagler, that is one of his better wins, against a fighter past his best, who I had winning that fight anyways. Do you see a lot of former LWs going 15 rounds with THAT Hagler? I see more WW having a chance against that Hagler than the reverse. Part of being a great champion, and proving your Ilk, is longevity, doing it time after time, year after year. We give SRL a pass for a spotty career, because of the greatness it started with, and frankly, because of how great he looks on film, but his early retirement in his first career did happen. All in all, there isn't much between them when it comes to, at their best, they were top 3 of their division h2h; and both pass the skill and eye test with flying colors, but for me, it's the other factors that nudge Duran over SRL in my book.