>But in my follow up, I was basically asking if, from the perspective of the view, it makes much of a difference if it's communicating with a Backbone model or a Redux store.

I think it makes a difference. When you work with a Backbone model, you directly modify it:

    model.set('completed', true);

When the logic changes, you need to change the call sites to call a model method or several model methods.

On the other hand, with Redux the view specifies what it wants to happen and not how:

    dispatch({ type: 'TOGGLE_TODO', id })

When you need to change how the whole state tree responds to that change you don’t need to change the components. This is the difference.