i think some guys here think JV will come to nba and dominate right away. It is impossible with his current body. I even hesitate to say Enes will have an impact in his first year, it is difficult to say. But at least we have seen some promise from him, watched couple of live games in the last 2 weeks. It is pretty obvious he is a very good rebounder, a tough hustle player with offensive skills. He just needs playing time and experience.
On the other hand, JV needs much more to succeed in nba. He needs to bulk up first, and then get some experience. He is playing in euroleague for the last 2 yrs and he is a more ready player than Enes, but the question is he ready for nba, not for euro basket?
I think he will be a good player but he will struggle a lot more than Enes in order to reach his potential in nba.