McDonald's had a "Southern" chicken sandwich a few years ago, like 2010. It was a total knock off of Chick Fil A right down to no sauce and a pickle. They were even going to start serving it in a foil bag...
I used to get that in lieu of when I lived in areas without a Chick Fil A. It was a pretty good substitute at times and at times it was not so good.
As for the Popeyes sandwich, I found it way too big and bready (if that is a word).