From what I get regarding Mac vs Zappe from Evan Lazar last week on PU was, and I am paraphrasing, is that throwing deep, they are pretty similar. It’s on the medium and short throws where Mac has been separating himself. He has been a lot more consistent.
In my opinion, it’s hard to evaluate Zappe because it’s hard to quantify the impact of having to throw almost all camp to guys that probably won’t be on the roster with the 3rd OL since with all the injuries the 2nd OL was with Mac vs throwing to the 1st receiver.
Zappe has thrown almost the same amount of passes as Mac this camp. They wouldn’t have done that if they didn’t like him. I have a hard time seeing them cutting him.