I've watched them a handful of times and Jackson has been up and down at best. The numbers back this up too. Objectively, he's been considerably worse than Tatum this season. Even the stretch you said he's been better than Tatum in, his percentages are still significantly worse across the board. Outside of his usage being up, there is nothing indicating him being better than Tatum numbers wise. On top of that he's doing all of this on a losing team who's sole purpose this season is developing him and Booker. Tatum is contributing to one of the best teams in the league record wise and has been one of their best players all year.