The difference, theoretically, is versioning. Beyond that, you'd check a theoretical changelog. The more information you give with regard to your question, the more likely it is that you'll get the answer you're looking for.
Here's what wikipedia says about 4.0.4 changes:
Stability improvements
Better camera performance
Smoother screen rotation
Improved phone number recognition
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.