That's an interesting take, rating the win based on whether if Fitch/Okami would have been champs in case GSP/Silva weren't around.
Its especulation but as far as we can tell:
- Both Fitch and Okami beat only one actual tittle contender from that era - Alves and Marquard respectively
- Okami was in more tittle eliminators (Franklin in an extremely close dec, KOed Tanner but missed the shot by injury, Marquardt by UD)
- Fitch/Okami had around same nº of ranked wins (not sure but I think it depends what source you look at, you can find a case for either of them)
- It's safe to say that if Okami and Fitch were matched up around that time (2008-2013), none of them would be a clear favourite over the other, at 170 or at 185. As a reference, when they eventually got matched up already past their pime, odds had Okami favourite despite coming off a KO loss, 3 Ls in his last 6, and moving down a weightclass for the first time in more than 8 years:
https://www.bestfightodds.com/events/wsof-24-fitch-vs-okami-998
- Okami had a highly controversial fight with Shields at WW in which he was the deserving winner in the eyes of most observers. It was Shields toughest opponent in that mytical run of him that ended with GSP, and Im pretty sure if they were matched up in a rematch....Okami would not have less favourable odds than Fitch against the same opponent.
I think all suggest that you could make a case for either of them, but in no way, shape or form, you can say the difference in caliber of competition between Fitch and Okami was big enough to justifiy claiming that stopping your opponent in a masterclass is an inferior performance than taking it to the juges, as lopsided as it was the decision.