Superposition is a mathematical conception, while the wave in a physical guitar string is a physical thing. Superposition is the mathematical description of _o

Superposition is a mathematical conception, while the wave in a physical guitar string is a physical thing. Superposition is the mathematical description of _our_ uncertainty about position of a particle. The physical wave in a guitar string does redistribution of mass in the string using energy. The physical wave does some work, while superposition does nothing, because superposition is used for predictions only. When we know the location or other properties of a particle after a measurement, then its superposition is meaningless. They share nothing in common in the physical world, while they share a lot in mathematical description of their behavior.