As I've seen the same person throw both the Passion and Big One, also using similar layouts, I'd say stay away from the Passion.  The Big One picks up into a much stronger roll towards the pocket.  The Passion never seems to rev up quite quick enough and burns too much energy when it hits dry.  It lets the lanes dictate its reaction too much.  I don't even like Ebonite, but the Big One looks like a great ball.  The Scorchin gave me a reaction similar to how the Passion looks.  The Action hooks quite a bit too, it gives a little more of a skid/arc look than the Big One does, but like I said, the Big One has a very strong roll towards the pocket.  The Passion is about 4 boards stronger than the Paradigm, and yes, it's supposed to be for heavy oil.  Not being particle, it can't be used on REALLY heavy oil, of course, but its hook potential should be nearly the same as all the balls you mentioned.
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