Tatum clearly has a more polished offensive game right now, and a much more diversified offensive game. He can hit hard shots and make it look silky smooth. So I went Tatum. That being said it Jaylen has already showed a lot of skill driving and finishing at the hoop along with a decent ability to finish through contact and get a foul. If he can just do that and combine it with a league average or better three point shot he'll be a very goo scorer. The three most efficient shots on the court are at the rim, at the foul line, and from 3 (if you can hit it). He has the potential to have all three in his back pocket. But he doesn't have Tatum's ability to manufacture a shot out of thin air.
TP for the bolded point and it's why I went with Jaylen.
I think both of them will have very good NBA careers and Tatum seems to be a better all-around offensive player, but Jaylen's aggressiveness is going to make him a solid 20 PPG scorer, maybe even this year. He also has a slick turn-around baseline jumper that is impossible to stop.
Our future is really bright.
Fair enough, but just recognize that your assessment seems to be a snapshot-in-time. The question is about potential, and I think the polling shows the correct answer. Jaylen is not efficient enough on his jumper and has even missed some free throws. Teams are eventually going to back off him to guard against the drive, but then foul him hard in hopes he misses some free throws. Now I recognize that so far JB has higher FG% and FT% than JT but I predict that by the end of the season, Jayson will be the more efficient scorer.
https://www.basketball-reference.com/teams/BOS/2018.html
I know the question is about potential, that's why I referenced Jaylens potential to eventually be good at all three highlighted areas. His three point shot has already improved, he shot 37% after the all star break last year and like 44% from the corners. Time will tell whether that's ultimately indicative of an improved shot, or just a small sample. If he hits his 3 defenders wont be able to back off him and he will take advantage by blowing by them. His free throw percentage does need to improve, but its not like he's Andre Drummond esque from the line.
All that being said I did still pick Tatum. He already has such advanced skills. He has the added bonus of basically being able to create a decent (tho usually difficult) shot whenever he wants, something Brown doesn't have yet and something many players never develop. I do worry that Tatum doesn't have a really explosive first step, he's more smooth than explosive, but I think his body control and length will still allow him to finish in the paint, especially against PF's.
In short, I like both, the fact we have two guys with the potential to be excellent scorers is encouraging.