What if that body of work isn't convincing enough? If both QBs do a comparable job? I mean, you need to give them both enough reps to make a decision if it's pretty close between the two.
And fwiw, I don't know. Have no idea what thr coaches think about it. They may already know and it's just a ruse, they may already be giving one the most reps and the other guy gets more reps next week. I don't think it matters that much anyway. This is more a dress rehearsal for those who will still be around next season.