Just to go over the differences of the ff 2/special ports, I'm amazed at how good the ACD version is, it has larger and much better animated sprites than the snes port, larger BG objects, greater variety in the scrolling stages(mai, terry and andy) breakable objects(baskets, barrels, or men on mopeds), opening scenes in some of the stages or objects scrolling across the screen and looks more colorful along with great music and voices...it have less parallax and poor impact sndfx though.
Here are some added shots with super sotb for the snes, which was never released as far as i know.
pce left, snes right and genesis bottom.