Even though only 1 nine hole round played.
4 holes with the Callaway ERC and 5 with Pro V 1. The difference was so big I am going with the Pro V 1.
The added distance off the tee and the sticking and stopping power along with the noticeable flight path angle on the mid to shorter irons, its test over.
So just got a deal on Golf balls .com, buy 3 dozen get one free dozen.
Added note: 3 sleeves plus 2 balls of ERC's for sale!😛
@Steven - So you're not going to include that one gently used ERC in your offered deal??? 😎