I played a round over the weekend with the prototype balls.  Covers seemed softer than my Pro V1x but more durable and less spin but felt the same compression-wide.  I had to adjust my shot placements through the round as once the ball hit the green, it bit hard rather than checking up and rolling out.  Played 12 holes with the same ball and it looks as good as new!  I will be buying these as soon as they come out- just need to know what they will be calling them....