difference between lv.43.5 hundo vs. perfect PvP IV at lv50.
I wouldn’t look at number of wins and loses in simulations. Higher defense and HP will give you opportunities to pull an extra charge move here and there. Scroll down to the section regarding medicham. it tells you key matchups in GL.
I don’t use medicham so I don’t know much detail, but the importance on IV is when you can survive longer to pull an extra charge move. For example, UL Empoleon on safe switch, with good IV, can pull its second drill peck against venusaur before fainting, but a bad IV can’t.
I would make the decision based on whether you really want to build a team around medicham, or can you build something else until you are level 40+. It WILL be a long grind to get a level 50. If you want to use it now or sometimes next season, you could max out a near perfect one now.