This is obviously a great renewal of the 96' masterpiece.
Additions since the original:
Three more playable characters
Updated character models
A world map is on display
Numerous touch mini-games
Extra secret areas
New boss fights
And personally, the graphics are good, very good, for a DS. However, the N64 probably has sharper images, but that won't be a problem unless you are picky about the graphics. Overall, this game rocks. It's the same game, yes, but a fresh coat of Nintendo magic has been applied for the purpose of renewing that nostalgic feel while at the same time giving players a reason to re-explore the mushroom kingdom once again. So buy it, especially if you are a new DS owner. This is one classic that you won't want to miss out on. Guaranteed.