Hunter has a very good instinct for the game. He passes well, shoots OK although his shot selection at times is iffy, but most importantly he plays very good defense. His long arms cause tons of deflections and he generally has quick hands. When he gets his man body he will be fine.
Young is maybe the second worst defender in the NBA after James Harden with practically none of Harden's offensive skills. The thing is, Harden just doesn't care, Young is just terrible.