It's tough. All the defence we've faced has been geared towards stopping Tatum. Doubling him, trapping him, facing the best opposition defender most of the time, etc. All the opposing coaches look to stop Tatum first.
In light of that, Brown has outplayed him so far this year. More efficient, scoring more, and playing better 1v1 defence. But Tatum is still averaging 24/8/4. He's passing better than Brown, rebounding better, shooting the 3 better and is targeted more.
I don't want to pick one, because we have both!