You can only get Super Challenge discounted, not the other way around.
The original Mutant Mudds features 60 (technically 80 because each of the 20 original levels has a sublevel within them) levels of platforming, and is like Donkey Kong Country in that it requires precise input and very good understanding of the movement options as well as the level design. It is hard, maybe harder than DKC, but since every level is smaller and the health system is a bit more forgiving, it doesn't feel that way. The first 20-40 levels feel pretty brutal but then you really get a handle on the game and it becomes really amazing.