  One of the most important issues of high-power hadron linacs is the choice of
technology with respect to superconducting or room-temperature operation. The
favour for a specific technology depends on several parameters such as the beam
energy, beam current, beam power and duty factor. This contribution gives an
overview of the comparison between superconducting and normal conducting
cavities. This includes basic radiofrequency (RF) parameters, design criteria,
limitations, required RF and plug power as well as case studies.
