Game Specs:
New features of gameplay when compared to the original ZX game include a homing shot and the ability to carry weapons without a Live Metal. There is 6 Biometal forms in total with addition of the 8 A-Trans forms. The other four biometals are Models H, F, L, P, and ZX. A secret A-trans becomes available when the player starts a new game after obtaining all 24 medals (gained by defeating bosses in a specific manner) in one file. This is known as Model a, and becomes usable once the player uses the item. It allows the player to use the 'classic sprite' Model A that was used in the Model a minigame.
Unlike the previous game, Both Grey and Ashe play differently, while in the previous, Playing as Vent or Aile was simply gender preference. Each character has a different charge attack for the Biometal transes (Ashe and/or Grey get some extra moves for certain forms, and even Model A plays differently among them). However, the differences are very slight, with both still acting the same movement wise and damage wise. Both are still related to Albert in one way or another, have almost exactly the same storyline (with the exception of the completely different beginning), and both still obtain the same transformations. Although picking Grey or Ashe slightly changes the gameplay and storyline, it's still more a matter of gender preference.