i like both players.
maybe DD has more upside, and with casey he can learn defense. i really think he does mprove a lot this season (charge for example). last night maybe only 11pts, but 7 rbd, 2ast, 1blk, that a solid game, even if he don't score as we would want, that solid. and he does a good job on defense. like i said, i give him some time to figure out how to transform and adapt in this system.
JJ is a solid sf/pf. he shows he has what is needed to be in the rotation. he has some energy on the floor to attack the rim or the opponant on D. Yesterday 13pts, 1blk, 2st, and only 4rbd.
but really id on't see how for now you can say who will be the best. I think their style and play complete each other. when the two will be on the same page, that can be a solid pair.
BUt DD can become something special when he will consistently be a solid defender.