frankie,
I have the Trade Secret, Souveran, and P21S. All very nice carnauba's, just a little different from each other. As Fuzz said, the TS is probably the same product as Pinnacle Paste Glaze. Still, it's a fine product, as are the others.
In the end, I would certainly buy the P21S, or TS before I would spend the money on Souveran.