Two of the same intakes..one FMS and one is edelbrock. Which one is a "knock off" of the other? Who cares! The ony detereminig factor to me would be performance and cost. The typhoon intakes from what I've see have smaller openings at the heads but longer runners. If you Gasket match them, there would be no performance difference only cost of the intakes. Hell, even the FMS and Edelbrock need to be matched as well.
Dont get hung up on name brands, all of the companys started somewere