I’d take Tre just for continuity. I’m so sick of roster turnover.I don't dislike Tre at all, but both his career and this season seem the picture of inconsistency. Jumping schools every year (meaning no one so far has been willing to pony up to keep him) and the "Brad-itis" he had this season. As to the 3-pt shooting improving, yes and that is great, but his only reliable spot is the corner. Easier to defend if you know that's his only spot.
It's not a slam-dunk easy call...it's close but I think I'd take Martinelli.