Aldo's a better all around mixed martial artist. Conor has a height advantage, and he can knock you out if you stand in front of him and allow him to tee off, but unlike Porier and Brandao, Aldo isn't chinny and prone to getting caught early in his fights. Mendes was never actually knocked out, just dropped by a good shot after completely gassing. He would've survived until the end of the round if the ref hadn't overreacted, but for all intensive purposes, Mendes was done. As far as McGregor fighting with only 20% of his ACL in tact, don't believe everything you read, especially if the source is Conor himself. It was well known that Conor had suffered some sort of knee injury, but nobody really knows the extent of those injuries outside of those closest to McGregor.