i have both, i have used the Original Inferno for approx. 50 games
and have used to Absolute for approx. 5 games.
and from what ive seen, the Original Inferno is snappier off the break than the Absolute Inferno, which tends to be a more hard arc than a snap.
i think the Absolute Inferno finishes harder, and is meant for a more oil than the Original Inferno, see profile for layouts.