When JDS was Conor's age he was in a different league of athleticism. JDS is a big guy who was super fast, very difficult to take down, and impossible to keep down for more than 2 seconds. Conor is a way smaller man who did not even appear to be all that fast against Diaz, the slowest LW maybe in MMA history (not saying he isn't a great fighter, just talking speed). He also looks nearly helpless on the ground at times, whereas JDS would simply burst up to his feet effortlessly even against heavier opponents. Conor might be more skilled in some ways (not even sure of this) but in terms of natural athletic ability, they are in different worlds.