After playing the game for about half a hour, some things i noticed:
The life bars at 1/4 don't flash, when they're red. Which is kind of weird having played the original cart. Obviously, this was a NoA guideline. What's weird is the Rage/Anger text and bar meters flash when active??? That makes a whole lot of sense.
The huge fireball that comes at the screen during the screen transition from the world map to the actual opponent stage, is missing it's sound effect.
Haven't been able to slice anybody in half yet. The sequence where the opponent stands and a spray of blood spews out hasn't happened either.
Otherwise, it plays pretty much the way i remember. Having a fun time.