Well, you can compare it as a fullstack too. It is mainly compared with React, Angular, and Ember as a reactive framework which isn't an incorrect comparison and is very valid.
Sure, but good luck replacing React/Angular/Ember in your Rails/Django/Node/What-have-you app with Meteor.
It's not really a relevant option unless you are at liberty to swap out the entire stack. It makes more sense to compare Meteor with MEAN rather than simply AngularJS itself.
