New Pro V's

In a recent issue of Golf magazine, they mention that they playing characteristics of the ProV1X have been tweaked for the 2013 version.  Is there some type of identifying mark to distinguish between this new ball and prior versions?  The pictures shown in the magazine look identical.

Easiest way to tell is by looking at the alignment aid on the side of the ball.  The previous models had black alignment arrows while the 2013 model as grey or silver arrows.

Also, the box says 2013 on the top left corner.

Hit 'em well!

Thank you.  I figured there would be a marking change. I haven't seen the actual balls yet, only pictures.