When buying or intending to use an asymmetric core it is best to know the lane condition and the reaction you want to have - plus an experienced driller who can transmit this into the ball. I have two asymmetrics, a TPC Palyer and a TPC Shooter. The Player has a 135° MB drilling and was versatile on any midium and up lane I have thrown it. But the Shooter, with a 45° drill, was a disappointment in the first place because the setup didn't match with the lane conditions. After an oil macjine accident and an different oil pattern this ball has spontaneously come alive!
So, if you know where and how to use the ball, a asymmetric can be the better choice because of the fine-tuning options such a core gives the driller. The drawback is its sensitivity if things do not match up. It is the prize for specialization you pay. Symmetric cores should be less prone to such changes.
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DizzyFugu --- Reporting from Germany
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