I wasn't exactly sure what the difference was; I kind of thought one converted to the other when enough people showed up.
Either way you rule the guns works for me, I was building the stoic traditionalist who'd side with the Elven family and not want to change with the times. Just because it's not been asked; are you going to make the bullets caliber, or the guns? As in, "composite" rifle or rifle bullet +1?
And also, did you decide on the Knowledge skill? And if it's unique, will it be background or combat?
Edit: And who will have it on their class list, also; that's kind of important.