For those forum members who revisit this thread at a later date, I have a story about 2013/14 vs 2015+ center caps. A friend of mine leased a 2014 SHO a few years back and had an issue with the Ford logo falling out of the center of the cap. I believe he lost two or three emblems and the dealer would replace them, just to have them fall off again. I think Ford fixed this issue in 2015 by changing out the cap to a slightly larger bore for the center cap on the wheel, and a modified variant of a chrome cap with a larger Ford logo that is printed on the cap, rather than being an inlay.
The reason I found this out is because I am currently running a set of 2014 Lincoln MKT wheels on my 2015 SHO... About a month ago, I found that the clear coat on my 2015 center caps from the stock flower wheels was separating... flaking off like dead skin. My local dealer warranty'd them and I got a new set... Went out to the car to pop them into my MKT wheels and found they did not fit. I ended up grabbing a set of 2013/14 SHO center caps off eBay in black and sure enough, they fit right into the MKT wheels, but the 2013/14 caps did NOT fit the flower wheels.
Moral of the story... know your wheel sizes