Heh, I guess I'd probably be the most qualified person in the forums to debate this one!
5th place: The XBOX version:..... is a piece of shit. Straight up. NEXT!
4th place: The SATURN version:Has extra stuff.... but is plagued by lousy visuals, slowdown, and an extra character that is so overpowered, a toddler could beat the game with ZERO effort on the first try! GONE are all of the cool transparency effects like when alucard changes to bat, or the water, or even how a warg dies.
Maria is just a straight crappy character! At first she seems neat, but after beating the game once with her, you quickly lose all interest. This little blonde hottie is pretty much a one night stand!
The new garden area and new monsters in it suck! And I'm not talking the normal type of suck... I'm talking the type that use teeth and DON'T FINISH THE JOB!
The prison stage is neat, and some of the monsters are really unique too (the wraith and ghosts in the reverse one in particular), and it's the most Castlevania-esque stage in the game IMHO. But it's also just too damn small and short. Just when you start to enjoy it, it ends. It's like halving a girlfriend that tells you to stop when your having sex..... RIGHT before you catch a nut. It's pretty much a tease.
The new music is DEFINATELY tight, and the new boss is actually pretty cool, and somewhat challenging too. Which is good. And the Maria boss is DEFINATELY one of the best fights in SOTN, period.
But sadly.... even with these positives, I've still got to drop it in next to last place. It just looks ugly if you've played the psx version, and the slowdown is god awful.
On the other hand though, if the saturn version was the first one you played, chances are you would enjoy it without a doubt!

3rd place: The PSP version:I have yet to play this version... so I can't comment on it much. But I have seen MANY videos, and here's what I can say:
I don't like the new dialogue. I LOVED some of the old kinda hokay 1700's type speak they tried to use thru the original psx version.
As for the voice acting, well....