Rinya and Bo is comparable, Rinya was a multiple time Japanese nationals medalist (bronze, bronze, silver )but when you consider he was competing vs guys like Rei Higuchi and Otoguro, it becomes obvious that Japanese national titles were harder to win than Bo's NCAA titles in his weight class. Rinya also has better international wins like 3 wins over Rei Higuchi who's an olympic silver medalist and worlds gold medalist, Sandeep Tomar who was an Asian Games gold medalist and Islam Dudaev who was a Euro games Bronze medalist, U23 Worlds 2x Bronze Medalist, Alexander Medved Gold Medalist etc and Alibek Osmonov who was a Worlds bronze medalist and Yasar Dogu tournament winner. Rinya also got bronze at the world cup and 5th place at the world games, those were events Bo didn't make it to. Rinya and Bo are both U23 Worlds gold medalists, they're comparable but it's hard to argue Bo was the better wrestler. There's several wrestlers currently in MMA on Bo's level of achievements, and that's excluding guys like Yoel, Madsen or Cejudo that are old.
Also, Rinya lost in the finals of the Japanese olympic trials to Ootoguro, who is...a better wrestler than David Taylor, probably my p4p number 2 wrestler under Sadulaev.