BrunswickJrPro... I don't get what you are seeing out of the two balls?  You say the XXX goes longer than the X, but the Triple is your oil ball??

My experience with the two balls (both being laid out fairly close...XXX in box condition and X matted with Grey Scotchbrite) is that the XXX starts up sooner, revs harder in the mid-lane and has a really hard arch shape to it compared to the X's later and sharper break point.  They are both great balls, just different in how they read the pattern.