Depends on what you want. Those are 2 of the more "opinionated" frameworks, in that they have a lot of fairly-strict rules that must be followed if you want thi

Depends on what you want. Those are 2 of the more "opinionated" frameworks, in that they have a lot of fairly-strict rules that must be followed if you want things to go smoothly. On the other hand, there's frameworks like Backbone (and derivatives, like Marionette), which are much less opinionated; fewer decisions are made for you, giving you more flexibility to do what you wish, how you wish. The trade-offs are that for the lower-level frameworks (like Backbone), you'll probably end up writing more code (both custom and boilerplate), and there'll be less magic happening within the blackbox that is the framework. Some like this, some don't, but ultimately it depends on the task at-hand and your own stylistic preferences.