nike rzn black ball

McIlroy credits switch to Nike X3X toe-sweep wedge for BMW PGA Championship win

The new Nike RZN Platinum as played by Nike staff player Paul Casey is ideal for players seeking Tour-performance control with moderate spin off the tee. 

What do we make of the golf ball played by Rory McIlroy?

What do we make of the Nike RZN ball as played by Paul Casey?