The core of the Thunderstruck pearl is stronger and the cover of the ball is Reactor, so it should be significantly stronger, especially on the backend. The accutread pearl to me was a great cover which got down the lane but didn't over react on the backend. If you have a dry shot with the backends still fairly open I'd opt for the Jolt Pearl, if the shot has carrydown the thunderstruck pearl would probably be better.
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