What are the key differences between superfluidity and superconductivity in terms of their underlying mechanisms and observable properties?

Superfluidity and superconductivity are both phenomena where materials exhibit zero resistance to flow, but they differ in their underlying mechanisms. Superfluidity occurs in liquids at very low temperatures, where particles move without friction due to quantum effects. Superconductivity, on the other hand, occurs in solids and is caused by the formation of Cooper pairs that move without resistance. Superfluids can flow without viscosity, while superconductors can carry electrical currents without any loss of energy.