Les voy a pegar a los dos por no leer el FAQ de MAME.
Esto quiere decir que pongan juntas ambas versiones del mismo juego bajo la misma carpeta de juegos, apretar F5 en MAME y jugarlo.Some games in MAME are considered "Clones" of another game. This is often the case when the game in question is simply an alternate version of the same game. Common alternate versions of games include versions with text in other languages, versions with different copyright dates, later versions or updates, bootlegs, etc. "Cloned" games often overlap some of the ROM code as the original or "parent" version of the game. To see if you have any "clones" type "MAME -listclones". To run a "cloned game" you simply need to place its parent ROM file in your ROMs folder (leave it zipped).