(But I have evaluated React code of other developers.)
The recent version 2 release is lightweight and makes Vue perform faster than both React and Angular.
In fact, in my humble opinion, the "scalability" factor depends more on how well the developers will structure the application than the view-layer-library choice (React or Vue). Angular provides its own opiniated way to structure the app; it may favour scalability if you stick to it, or it may difficult scalability if you later find out the app needs a better, more flexible or different structure.
Finally, ease of use: it's tons of times easier than Angular. I can't compare to React. What I have to say is that it is a joy to work with Vue - it is not only "easy", it is fun, it is smart, it has what you need, when you need. Documentation, community, gitter chat, forum, github issues - you will always get support it the trickiest moments.
I really like Vue.