Better. The N64 games kinda have bad quality and now for the DS they have perfect quality. There is a Mario game but dosen't have Mario called "Diddy Kong Racing". It has kinda bad quality. Hope this post helps!
I thought some of the controls on the DS version of Super Mario 64 were kind of off. Spinning people around using the d-pad or touch screen, especially. It's much easier to do with an analog stick.
I didn't have nearly as many problems with the dpad as everyone said. The real problem was having to stop to move the camera. Rainbow Ride hurts me inside.