Personally, it would’t surprise me if both Nurse and Chychrun had their best career year last season. I would brace for a regression from both, but this is how I value them:
Next season I prefer Nurse. He plays with ELITE talent, and Arizona dealt most of their decent players to commit to a rebuild.
3+ seasons from now, I want Chychrun. He has certainly dealt with injuries in his career, but if he stays healthy he could either be part of an up and coming Arizona team, or even better play for a better team.