A great game in all the aspects.
Graphics (10/10): They've made a lot of new improvisations to the graphics, now ts more fun and realistic, and you will probably want to compare the changes hehe...
Story (9/10): The story here made a mix of enemies, and now you won't focus all the story on someone, there are side-stories that come along with the main one regarding a character or another.
Sound (10/10): The sound is the same of the OG1, and its great, the new sounds are with the new characters/bosses, and you have a battle music test mode.
Playability (9/10): Its the same for the OG1.
Difficulty (hard): who complained about easy bosses in OG1 will have a surprise in OG2.
Its a great game in all the aspects, it's worthy playing, xD