In what ways does Zurb Foundation give more functionality or features than Bootstrap?
This article has a nice summary of the differences. Straight from that article:
Despite Foundation being able to boast more features, I would say the two frameworks are now pretty much on par. Bootstrap 3 is moving more towards an all-in-one development environment. Whereas Foundation offers more in the way of interactive components for rapidly building feature-rich apps and websites. They both look really clean, they’re easy to customise and they’ll speed up the development process enormously. So it really comes down to what suits you!
List of foundation 4 only features: