They'll probably be fine, although that's highly dependent on what else you keep in your pocket.

I would conjecture that one of the metal bodied variants would probably be a little more durable, but if you're going to have it sharing space with other stuff with your pocket maybe one of the silver, rather than painted, options would be a better bet. I've never found painted metal objects that have since had the shit beaten out of their finishes particularly attractive. But that's just me.