I don't throw either one of these, but the anchor guy I bowled against last week had both of these, and from what I saw, the Reign Supreme is a little quicker off the dry, with a more angular move.
Now...all that being said, obviously the RS is newer with a cleaner shell, and the Hyroad is older, having been used more....so surface prep should be a key consideration in this evaluation.
But that was just my observation.
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Duct tape is like 'The Force'. It has a light side and a dark side, but it still holds the universe together.
Some days you're the bug some days you're the windshield.