If we wanted to compare muscular endurance between a very large person and a very small person, what method would be the best method to use?

Muscle endurance is the ability to do something over and over for an extended period of time without getting tired. In the gym, that may be doing 50 body weight squats in a row, moving to a rhythm. Skiing, for example, is a sport that uses muscle endurance

If we want to compare the muscular endurance we can give the both bodies different exercises and then overall compare how much muscularly fit both of them are.