Nephrology or PRM as a specialty?

Hey i know its kind of a dump question , but im so confused as to what to chose between these two specialties , and i know they are very different, wich also adds to my inability to make a decision, any advice on how to know wich specialty would be better for me and how to make a decision, i ve been overthinking a lot and i reach no decision at the end. Any advice or info would be much appreciated