chrisvfritz

I think it's best for any sized project honestly. It's used quite extensively in enterprise, including at many (if not most) of China's largest companies: https://github.com/vuejs/awesome-vue#enterprise-usage

There are certainly some similarities in the reactivity system, but I find them quite different otherwise (especially in Vue 2.0). There's a comparison between Vue and Knockout here: http://vuejs.org/guide/comparison.html#Knockout