Poku is more fluid athletically than Bol Bol or Austin Daye. He also has far better handles, is a better passer, and has a more natural feel for the game.
I like Pat Will. I just don't view his realistic upside to be as high as other people seem to think it is. If I was drafting Pat Will it would be with the realistic hope that he can develop into a solid starter who is a good two way player. 3rd or 4th option on offense, rock solid team defender. I think the odds of him becoming the star some see are low.