There is something on FFIII reminiscent of FFXIII.
The Maker can be compared to Noah in that he left the world.
Barthandelus can be compared to the main villain(one of the apprentices).
Pulse suffer a devastation like the "world below" on FFIII which was flooded.
The floating world is a type of Cocoon and a haven for people to escape Pulse.
Eden can be compared to the tower which floats the world.
If someone remembers something else I would thank.