10 WEAPON Is Just A Cutscene In The Japanese Release
9 The Western Release Has Extra Quests
Coinciding with the additional WEAPONS fight was a new character and quest line. There was a man in Kalm that helped out players with both Emerald and Ruby. In order to make Emerald easier, they could get Underwater Materia.
If they brought back items from both fights they would get a Gold Chocobo and a set of Master Materia. Both fights did not need to be won, to be clear.
