Keep in mind that all balls are consistent shot to shot...the bowler is the variable
Now if you mean which is smoother, I would give the edge to the Prodigy. The Hyroad is an AWESOME ball that is incredibly versatile, but the Prodigy has a little smoother change of direction down the lane.
Good Luck!
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Little known fact: In Russian "Hope" and "Change" translate to "Tax" and "Spend"