They are very similar.  I had both, and both were drilled about the same.  Pin above the fingers on the center line, and the cg kicked out slightly to the right, just above my center of grip.  I did not have much success with the box finish.  I just did not really care for the reaction.  I put a light coat of polish on them, and what a difference.  The Dark Thunder is a heavier rolling ball than the Atomic Charge, and reads the midlane a hair earlier than my Atomic.  Overall hook was about the same for me.  Hope this helps.