Now I didn't play the previous version for the DS to compare them, but personally I thought that the graphics were shrunk down too much to fit on the small screen. It was quite difficult to keep your eye on everything at once and still have any clue what you were looking at. All of the buildings are grayish brown, so it can be difficult in the early ages to discern which type of area you are looking at on the main sheet. On the build sheet though, it is easy to see what is what. Each zone has its own color code, so you can see at a glance what is what.
The background music is a relatively soothing classical type piece. When you have disasters though, you'll get to hear the sounds that they make. When you talk to the people, they don't talk back out loud. You only get to read what they said. Actually, there aren't any real voices in the game. Even when the guy that's telling you what to do talks to you, he still doesn't speak out loud.