Without exception, all of the orange match safes I've seen have been made in China, and seem to have an endemic problem with the flint. As near as I can tell, the flint is recessed (almost imperceptibly) into the case just far enough to where it's nearly impossible to get a decent spark off of it. The domestically produced OD match safes seem to be all right, and I've as yet had no problem generating useful sparks. They wouldn't be my first fire starting choice, but it's nice to have them as a backup.

As it stands now, I use both types. The OD ones are used for matches (and a striker strip); the orange ones are used for Vaseline soaked cotton ball tinder. I'm not sure this color-coding offers any particular advantage, beyond preventing me from needlessly opening my tinder container, with its inherently messy possibilities.