It depends. In winter, when I need my headlamp every day, I prefer to use a H150 or H04 with magnetic charging, so that I can quickly (dis)connect it. I can do the same with the M200, if it needs a charge.
When I’m not at home or don’t need the flashlight often, USB-C is usually easier because I don’t need to take the special adapter with me or have it cluttering my desk.