All those have are morons running around like idiots, in the first one people run through cars! I assume that Dead Rising will have the enemies moving in different patterns, chosing different ways to jump down on you, etc. That's a lot harder. You cannot really compare it this way, because they're very different games.
Or would you be happy with 100 zombies, but with a catch - they can run through palms, walls, cars and whatever. They also have no real goal, and do not try to do something clever to catch you.
Edit: Looks like I was beaten to it.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS







