Slim,
From what I've read and heard so far, the 2nd Dim will grab more and thus be less angular than the One Pearl which has the potential to be a super flippy ball. The mica theoretically gives the 2nd Dim more traction earlier, making one of the strongest pearls around (according to BTM magazine). So, if you've drilled them right, they could complement each other very well.
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"None are so blind as those who will not see."