Backbone.js与ASP.NET MVC

In the last few days I've been reading about Backbone.js and how it simplifies JS code interaction with View elements, basically within HTML. I've also read about the differences between KnockoutJS and Backbone.js. Now I'm thinking whether using one or the other inevitably leads to duplicating the code that we already have in our MVC app (mostly ViewModels and routes in global.asax) inside our Views. Essentially requiring us to code another set of Models in Backbone or Knockout. As I understand, with KnockoutJS this is even more prevalent, that's why I thought I will choose Backbone but now I think it is not that different - after a few examples I saw that same duplication is becoming evident.In the last few days I've been reading about Ba