It's not really a fair comparison for several reasons. Namely that to match Ember's functionality, you have to add several libraries to your AngularJS app. Eventually you'll reach the point where you've effectively got the same size in several libraries, as opposed to one. This is the same argument the Backbone guys use to make and it's stupid.
If you don't need that level of functionality, then fine, don't pick up the framework with a few extra KBs. But keep in mind that with any luck, your app will start to grow. When it does you'll need to scale and perhaps you'll discover there was value in using a more functional framework.
