Ability. For instance, Vitali and Fury haven't great resumes but they could beat all HWs in the history.
H2H Floyd kicked his ass as would Leonard , Hearns, Benitez and Duran all at their best and he at his best.
Taylor, Lomachenko, Spence, Teofimo, Usyk, Inoue, all get beat by a prime Canelo (25+ years old) A Pre 25 year old Canelo is a slightly different story.
I do t like Canelo’s diva attitude or ped scandal, but he is clearly a p4p legend just looking at his skills. He got the benefit of the doubt against Trout and the draw against GGG. I think he beat Lara and those who claim otherwise might have to do with appreciation of style differences. He definitely beat GGG in the second fight in a highly competitive fight. All that said I think he was always world class level, but he has definitely gone a level above since going to 168 and above. He surprised me when he pounded former 175 boogeyman Kovalev and Ring/unified champ Smith and he made it look easy. I think he is a competitive match for anyone 160-168, maybe 175.
Ward from the list above, would be an extremely hard proposition for anyone head to head including Alvarez, another natural winner and a naturally bigger guy and also very tactically aware fighter. Canelo would be very competitive against most opposition, but he’s had his share of difficult fights and a bit of luck on the way, so I wouldn’t necessarily always have him favourite against some of the best middles and super middleweight of different eras. Exceptional fighter but the super middleweight division has been the weakest I have seen it for a good while, which made taking over that division in no time a lot easier than it would have been in years past.
He really lost to Lara & Trout plus he really lost BOTH fights with GGG in the opinion of the majority of knowledgeable boxing fans. Plus the dark clouds of peds abuse & corruption really affect his legacy too. Without them would he have ever legitimately been World Middleweight champion. I don't think so
Why don't you go back to the ballet board cause you sure DKSAB do ya ROFL GGG OWNED Canelo !! TWICE!! but Vegas saved him