It is a matter of opinion, but when someone gets open for a shot, you want it to be Dixon. He is streaky at times, but it usually occurs when he trys to get fancy. If the shot is open, Dixon will nail it.
However I think Jacobson will have the better NBA career, size matters at the SG position, and the only way to get around it is by making up for it with other skills. Juan instead will play the point, but its going to take time for him to adjust and learn everything he needs to know. He has another tough job ahead of him.