Thanks @Boone ! Yes, that is what I was thinking is that Option A and Option B are essentially the same thing. I want to eliminate the legacy wired doorbell systems mounted on the hallway wall and shove the cable back inside the wall and seal up the hole. I installed the ChimePro yesterday and have the nice “Ding Dong” noise working properly. So this is about getting rid of the legacy 1970 pre-existing box and then pivoting exclusively to the ChimePro.
Thanks again, this does help/confirm what I was thinking. 