No.
DS version is better than the N64 version. Even by a good margin.
Has more star and 4 charter.
Madness. The new content didn't add to the game, it took away from it. And the alterations made to the level designs either served to water down the exploration and challenge, or were made to fit around the compromises of controlling Mario with a D-Pad.
For example, some pieces of level furniture were made bigger (or was Mario smaller?), the Balloon Mario Powerup allows you to sidestep smart pieces of level design that would once demand you mastered the wall jump. The new characters and their unregulated physics and moves mess around with a game whose levels were made wholly around Mario's diverse moveset, too.
One thing that stuck out the most to me, a decade on, was that bit in Snowman's Land where you have to *boing!* off one of the flower enemies to reach a far-off platform, but what's the point when you can just switch to Luigi.
This is more subjective and not game-design related, but I think the re-made visuals, while truer to Mario artwork in 2004, lack the charm of the original texture and character work, which was definitely made to fit the limitations at the time. Of course, the visuals *had* to be remade to some degree given its nature as a DS launch title, but it really changes the feel of the game.
Not necesscarily, there's a significant amount of good new content in 64 DS.
Some of the added content is alright, but the problem is that content doesn't exist in a vacuum, instead it sits alongside all the other alterations and compromises this version makes. It's still good, and I enjoyed it, but 64 DS is not a version of Super Mario 64 I would want to lose myself in, unless I had no way of playing the original anymore.
Edit: Forgot about the minigames, which were added content, and do exist in a vacuum. But they were included with New Super Mario Bros.