And this is why I keep bringing up...
Are we sure that Tatum's ceiling is higher than Jaylen's?
"Tatumís ceiling higher than Brown - not so fast"
Yes it is
You cant teach what Tatum possesses
Brown doesn't need to be able to do the same things Tatum does to be a better player.
Zach Lowe made the point that Brown is a monster athlete and that his athleticism will become more apparent as he develops his skills more. The gap between his raw athleticism and Tatum's is pretty significant. Brown is quicker and faster than anyone in the league who is his height or taller.
He does do some things better than Tatum already. He's on his way to being a dominant, all-NBA defender. He can finish through contact, which Tatum can't do very well yet, and he's quite good with either hand, which Tatum doesn't have at all.
He's also got an alpha dog mentality. He had a poor ECF game 7, but by and large he tends to play big against the best players.
If he learns to make better reads on where the help is coming from, and protect the ball better, he will be impossible to stop. Lots of younger players improve at these things. He might plateau, but I wouldn't be surprised if he ends up as the teams best player.