Tatum has gained a lot of weight/muscle in the past 6 months or so. I'd guess he's 10-15 pounds heavier than the 205 he's listed at. Jackson is more athletic, but Tatum is more skilled and plays with a smoothness/body control that a lot of people say reminds them of Pierce. Neither are shooting 3s well, about 28% for each of them, but Tatum's 86% from the lines bodes well for him while Jackson is only shooting 54% from the line. Right now, and it's still early, Tatum is the guy I'm hoping the Cs land.