OK, I'll do my best! I'm going to try to answer on instinct, with the answers that I would have given before I started all this pondering and questioning my assumptions.

ETA: From having tried the poll, the lesson I've learned is that I tend to want to err on the side of "fanfic" when in doubt. But I would have answered the RPF question differently if it had said "historical fiction" rather than RPF, and I would have answered the Biblefic question differently if it hadn't used the term "Biblefic".