In terms of intensity, the prisoner is a little bigger (of course, the difficulty of action has to be gradually upgraded). Keeping means doing a lot of actions in a short time, with little rest time between actions.

Relatively speaking, prisoner's fitness is a kind of resistance training method that can be taken when there is nothing to do (at home, not going to the gym). The main effect is definitely muscle gain. However, when you practice to a certain extent, you can't do it if you want to strengthen it, because weight is a very fundamental factor to stimulate muscle growth. The physical fitness of prisoners basically depends on their own weight, so, do you understand what I mean?

And KEEP, as I said just now, means more HIIT, so it may be better for reducing fat, and some KEEP actions require multiple clusters, that is, comprehensive quality (well, core strength and the like, that's probably what it means, so we need to analyze the specific actions)

There are some overlaps and differences between the two, depending on what you want.