The raft is much less maneuverable than a catamaran, so the raft may simply not fit into difficult narrow rapids with many turns.
The catamaran, thanks to its "agility", can skip all difficult sections.
The catamaran usually passes shallow rivers, rivers with difficult rapids (3-4 k.s.), where there are no long stretches (areas of calm water). In Karelia, these are the rivers: Umba, Pista, Tumcha, Keret, Tokhma, Kiten, Uksa, Loimala.
In the raft, the participants sit half-sideways on the balloon (their legs remain inside the raft). On a catamaran, the landing is knee—deep - tourists sit on balloons "on horseback", on special inflatable "seats", while their legs are fixed in special stirrups.
The catamaran is designed only for an even number of 2-4-6 rowers (teamwork does not play a mediocre role on this rafting facility), 8 participants can be put in the raft, while the main responsibility for
the exact passage of the threshold lies with the instructor.