As far as I can tell, the original Inferno is a very versatile ball for a wide range of conditions, from medium to heavy oil.
The Intense Inferno has a more angular hook, but it needs dry boards to show its potential, and less oil in general. Looks spactacular, but can easily become a bit itchy. Good show effect, but nothing more.
Cannot tell about strength on carrydown, but I guess that the original Inferno will be easier to handle on this, and more versatile in general. On drier boards the Intense will have an edge, it will depend on which conditions you want to play.
Compared to the BVP Punisher the Intense will be the stronger/better ball.
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DizzyFugu --- Reporting from Germany
"All that we see or seem, is but a dream within a dream..." - Edgar Allen Poe