To clarify better. The only planes that use “Heavy” in Infinite Flight are all variants of 747, 757, 767, 777, 787, A330, and A340. The only plane that uses “Super” is A380.
I would recommend not using heavy or super because wake turbulence has no affect in this game and therefore the use of heavy and super would have no benefit. All it does is add to the time that your callsign takes to be read in the atc voice. This clutters up the system more.