What's the difference between deactivating and disabling a breakpoint in Chrome Dev Tools

Chrome (Version 23.0.1271.101). I'm on OS X, if that even matters.

Why does Chrome have the ability to disable and/or deactivate breakpoints? Is there some power use I am not aware of?

I have noticed that I can disable some breakpoints, then deactivate all. Upon reactivating them, the same disabled ones are disabled. Other than that, what's the purpose of having having the two options?