cook plays the 2/3 hunter the 4 harris 3/4 (usually the 4)
hunters role is to eat space on offense, essentially in the high post or somewhere else he makes it so 4 cant double down on oden. defensively to eat space. in eating space oden/hunter can dominate the paint.
harris allows the team to create space by his perm play. what it gives you is two different options. essentially allows the team/matta to dictate what type of game they want to play. if they want 4 around one or a more traditional 2 big man game.
having the ability to dictate to teams changes what you can do and allow you to do so many more things. essentially with harris and hunter you can have the best of both worlds, well to some extent obviously but point made.
hunters development and improvement will help down the line against the floridas of the world who go with a horford, noah line up. i hope that makes sense?