Watching the video for Invisible Card, the equivoque is very similar to Inferno.
I would bet that it's darn near the same trick, with the exception of "burned edges", shown in the conclusion of Inferno.
All this being said, this can't be worth $49.95. It's too similar to Inferno, and Inferno's presentation is much more "dramatic" leading to a larger impact conclusion.
Plus, Inferno is ~$20.00 less expensive.