Oscar's resume is higher because he fought old fighters (and smaller men) while Mayweather fought fighters in their prime and bigger men? How many men did Oscar face and beat in their prime? Chavez - OLD Whitaker - OLD (lost imo) Hopkins - OLD (lost) Quartey - out the ring for 18months (still lost imo) Casteijo - OLD Vargas - looked shot after Tito Mayweather's prime opposition: Corrales (P4P) Castillo (P4P) Hatton (P4P) Judah (P4P within 12months) Chavez (prime future champ, practically unbeaten 35-1-0) Ndou (top contender Mayweather was also outweighed by upto 15lbs on fight night, Delahoya was a weight drainer who usually outweighed opponents by 15lbs on fight night Also bare in mind Mayweather was avoided by many where as Delahoya was a cash cow and could get any fight he wanted.
Oscar got gifts against Whitaker, Sturm, Quartey, whats your point? Mosley 2 could have gone either way, Mosley landed the better punches, Oscar landed more pitter pat shots
Hernandez and Castillo weren't when Floyd fought them. Corrales was p4p in the ring rankings but wasn't in KO mag. Corrales never should have been on that list imo but can't deny he was in the Ring top 10.