Comparing the two side by side, it would be unfair of me to say that the graphics haven't received an upgrade and that the look of the game has improved. That being said, if you couldn't compare them side by side you would still feel like the graphics are from earlier Final Fantasy renditions.
Because this is a series game based off of an Anime, there is little you can do to get away from the original music or sounds, and you wouldn't expect them to. Voiceovers still have all the excitement and flair of Styrofoam, but this is obviously a redubbed game as the dialogue stops well before the characters lips do.