To be a little more explicit than DeadFlush, house oil patterns have the potential to reduce the difference in the reaction of any pair of balls, to such a degree that these balls, which can be very different in their overall essence and designed oil coverage, will appear to be the same.
You should test or compare balls on 2 - 3 different oil patterns and on 2 or 3 different lane surfaces, IF AT ALL POSSIBLE, in a couple of different centers, BEFORE you fix in your mind how one ball differs from another
OR before you assume that one ball is identical to another.
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"None are so blind as those who will not see."
Edited on 2/28/2007 2:07 PM