there's really no way to tell for sure. if you compared the major ingredients it would tell you something, but i doubt either one tells you the chemical components.

Without that info, I would say:

positive: it *probably* does basically the same thing. Carbon is carbon, however deposits of hydrocarbons from gasoline are not the same as those from oil, as found in our engines.

negative: it definitely was not specifically formulated for rotaries. Also, buying a can of seafoam or zoom-zoom cleaner is pretty inexpensive, and you know it works. So that's probably a better idea...