Initial thoughts after browsing through the React docs –
AngularJS is like your parents, complicated relationship but can get the heavy lifting stuff done for you quickly. It can also have some performance issues because it’s trying to look out for things you don’t care for.
React is like a young karate kid. Capable of great things and performance but needs lots of training. Expensive upfront because you need to think through your models more.
To be fair I’ve used AngularJS alot more, but React is looking pretty interesting!