Cover plays the most important role in ball reaction. The change from solid to pearl will be quite noticeable if you used the same layout. Without getting too technical, the numbers you are comparing all have to do with the core. Both balls use the exact same core and thus the identical numbers.
Don
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"On-base percentage is great if you can score runs and do something with that on-base percentage. Clogging up the bases isn't that great to me. The problem we have to address more than anything is the home run problem."
~Dusty Baker being a total fool
