Other than the fact that it has been repeated endlessly, why exactly is Tatum's ceiling higher?
My take is that Tatum submitted to a max NBA training regimen since age 13. Did the most dedicated possible path through AAU/Duke. Nothing but basketball. Jaylen decided to also be a person for a while. So while Tatum is 1 1/2 years younger, he's been 100% dedicated to training for a pro career longer. When he was a rookie and Brown was a 2nd year pro, Tatum had put in more hours in the gym working on his toolkit, and everyone decided he was more talented.
Both guys have been very dedicated since they became pros, and it shows. The progression is there for both. But Jaylen has improved more, and he is considerably more athletic, and it's starting to appear that he is a bit more competitive too. Twenty games from now, it could very well be obvious that Jaylen is the alpha on this team.
I'm curious as to what you base the bolded on?
But I think Tatum is labelled as having a higher ceiling because he's more naturally gifted. To me, Jayson has an old man's game - the footwork, the shot - he was going to have a place in the NBA even if he didn't evolve into an All-Star. Whereas some guys come into basketball as hyper athletes but don't necessarily have a good feel for the game and have to learn it. There's nothing wrong with that, some guys like Giannis and Butler can get there. On the other hand, you see guys like Josh Jackson wash out. I don't necessarily know if it's about a higher ceiling for either guy because they both seem really committed to putting the work in, but I would say the floor for Tatum was higher than the floor for Brown.