Beta 1.0 and 1.1 has a difference. The difference is the view bobbing animation making the game have more of a better feel to it. Another is the. There is also another difference which is that the game runs a little bit faster and better. These are some good changes.
***NOTE*** keep your game updated with the Original Sounds pack on this page or the official Nazi Zombies: Portable page. They are the actual sounds from the Original Nazi Zombies making the experience in NZ:P better.