Well, you should probably start out with the standard classic pass, which is what Oz is doing on his site (as far as I can tell). He is doing the "Invisible Pass", which is only a cover for the classic pass. I learned my pass from a magician friend, but you can also learn it effectively from that one video from that one site that must not be named

, as well as On the Pass by Richard Kaufman (I totally regret buying this last one, only because I already knew all the passes and it didn't teach much else other than how to do them). I would recommend the first one, I hope you know which one I mean. But since your an
Illusionist, and you are probably as smart as a
Ninja, you can probably figure it out. Anywho...yes, the classic pass with Invisible cover is the one used by Oz on his site, and the riffle pass is just a classic pass except you riffle the cards at the end. I just downloaded that e-book by Braue, "The Invisible Pass", on Lybrary.com, it was 2.50, and the pass taught there is great. It's entirely different from any variation of the classic pass, and if you can get this one down, it truly is invisible. It's also much easier. So I would learn both. Hope this helps.