What is the difference between cardiopulmonary exercise test vs exercise stress test? does cardiopulmonary exercise test combines both and better?

Not better: Exercise stress tests measure your peak functional capacity and ischemia (blood supply), arrhythmias, and blood pressure response. The different tests are used for different issues. Cardiopulmonary stress tests also measures peak oxygen consumption which is useful for evaluating certain disorders, particularly prior to heart transplantation