Let's see....
Jobs-
FFI-6 when you start, each having its own promotion after proving yourself to Bahamut. You may only have 4 jobs per party, and once chosen, may not be changed.
FFV-None at start, 21 when you have all crystal shards. Can be changed any time after battle.
Advantage-FFV.

Summons-
FFI-None.
FFV-Chocobo, Sylph, Remora, Shiva, Ifrit, Ramuh, Titan, Carbunkle, Shoat, Odin, Leviathan, Bahamut, and Phoenix.
Advantage-FFV.

Magic-
FFI-Bought at stores.
FFV-Mainly bought at stores.
Draw.

Monster attacks-
FFI-They hurt you.
FFV-If you know how to use them, they can hurt the enemy.
Advantage-FFV.

Originality-
FFI-Thought out.
FFV-Used FFI-IV for blueprints.
Advantage-FFI.

Winner-FFV.