So did a bit of looking around the reddit for camera suggestions, and these two came up regularly. But after looking at several threads, I'm not quite sure what the differences are in people's experiences. Looking at a comparison on their amazon pages, c920 has "better" light correction" to the c922's "good," so assume there's one difference. The c920 has a standard lens while the c922 has glass, which is another. But I'm the sort of person that likes to know how things have worked once they're in people's hands.
I'm fine with spending the extra on the c922 if its more worth my money. My lighting situation isn't ideal at the moment but it isn't bad in my opinion, and changes can be made to improve it.
I know there have been camera discussions, but most that are relevant to me seem to be at least a month old, and updates and such can happen in that time.