I received an appointment to USAFA back in November and I am trilled but I have been holding out on accepting to wait for USNA. I need to accept/decline my appointment to USAFA by April 15th. I am very fortunate to still be CPR at this point but I am nervous about cutting it too close. Would it be beneficial to let USNA know about my situation because I don't want to have to make a decision between the two in just a couple of days.
First and foremost, congradulations on your USAFA appointment. Well done.
No, it would not be beneficial to let USNA know about your situation as they don't know about your situation and bluntly, they don't care. These are completely independent processes and your acceptance or being declined to one SA has absolutely nothing to do with what another does or doesn't do with your application or how they make their decisions.
They won't compete for you if that's the implication and the decision of how you proceed will be yours alone. You have roughly a month before you need to hit that button and hopefully, you'll know your USNA status by then. Start thinking it out now so you can be 100% comfortable with that decision when the time comes in the event you're faced with those two options.