I'd say they're pretty damn close in shape. Obviously not 1:1, but much closer than I originally thought they were tbh.
Even the basic layout of forest and desert is fairly close. Ul'dah, Ala Mhigo, Gridania and Sharlayans colony all shift over to the map of Africa
reasonably accurately, even Ishgard sort of makes sense, if you picture the Sahara as a frozen desert instead of a sandy one.
The main differences seem to be the lack of mountain ranges along the west/south of the Sahara, and Africa's complete lack of a sea of floating islands
Madagascar was just shifted to the other side of the continent.