Not that Mag is all that similar to Yoeli, but in terms of raw athleticism & makeup we haven't had a true 4 since Yoeli. (And unfortunately Yoeli had to play the 5 for us much of his final two years w us.)

Mag is explosive, strong & fast enough to defend the 3 or 4. And he looks great in transition to me. (In my very limited look into his film.)