Ok, I think it's great that you are so young and so motivated about bow hunting, I wish I would have picked it up at your age. Besides that and even before the responses get super technical, which I know is what you are looking for, I think you need to think about simpler things. Seasons for archery deer and antelope overlap, you could technically shoot your pronghorn one day and be out the next going after deer. Without time between hunts to readjust to a separate bow this could make things difficult. The most effective thing to do in my opinion is to pick the bow you are most comfortable with, shoot it as much as you can from now till Aug 1 and roll with it through the season seamlessly. It's not like you are going from shooting a gopher to a water buffalo, both bows will be effective and the more dialed in you are with one, the easier the transition, actually the only transition will be your hunting tactics, your shot will be second nature. This is all IMO but I just wanted to thow it out there, I will be hunting deer and pronghorn with my bow this summer and the thought of switching bows between the two makes zero sense.