I haven't played the original. But this is still one of the best Sonic games on the GameCube!
Voice-Acting: 8.0/10 - Stop complaining about how girly Tails sounds and just play this game. It's the manliest he's ever gonna get.
Graphics: 6.0/10 - they make the characters look absolutely awesome but everything else looks exactly like the dreamcast graphics. (not that they are bad but Sonic Team could've a least done that much to make the humans look better too)
Gameplay: 9.5/10 - It's a heck of a fun game! Minus 0.5 for all of the glitches and times the character will get stuck in the wall or fall right through the wall and die. Still solid.
Controls: 10/10 - beautiful as ever. Although they didn't put a C stick on the controller for nuthin, why use L and R to control the camera instead of C stick?
Music: 10/10 - classical Sonic soundtrack and catchy tunes = Solid!
Camera: 7/10 - Ya know I never really have problems with the camera myself in any games really. When i do have problems i normally just ignore it and keep playing. But when it gets stuck in the wall, man, thats annoying.
Difficulty/length of game: 10/10 - Its pretty hard and long overall. Not the longest or hardest, but it ain't a cake walk.
Story: 8.5/10 - OH, trust me. There's been worse. *koff*billy hatcher*koff* But the story is acually pretty good.
Overall: 8.5/10 - because Chao rock!!! AND also because its fun. No matter what version of this game you pick up (DC, X360, PSN, GCN, whatever comes next...) I do encourage you all to play this game, because its a great one!