I am allmost sorry you mentioned this, here goes. For the past 100 years cue balls have been made out of different materals. And for the past hundred years they have been made in different countrys with different makers. And today is no different as technology advances somebody (corperations, scientists,any one trying to make a buck) is always experencing with different looks and adding thier own spin with other materals, weights or whaterer else they might like to try to come up with the perfect cue ball or whatever. What everybody has failed to mention is like everything else we have at least 3 different measel balls out there and some are 6 oz some 6.5 oz with some differences like blue circle and red circle and super arometh and belgem. So it is more complicated than just one ball or another. I can discuss this for hours as I have for the past 5 years as I have been expermenting with all different cue balls but enough said here. Different makers of cue balls usually produce a little different result.