Here's my qualms on the situation.
Cutler is coming off a season ending shoulder injury, in the scenario he goes with a decent amount of games left on the schedule we - as an organization - have already proclaimed that we don't trust Moore to take the helm for more than just a few games. That was after all the entire reason we pursued Cutler.
I'd say we have to go with Fales here for a couple of reason. First is the case mentioned above. Second is that Fales at least provides us with young potential development.
We already know what Moore is; a clipboard babysitter.