Typescript really has more to offer with react. It type checks the jsx(tsx), Offers code completion on components and their properties, you can refactor/rename properties and components throughout your project without side effects. Typescript is kind of blind to angular templates.

React offers ability to use same code on server side and client side. Easier to test a Vdom library. It's a lot less complex, it's perf is a lot better, you can live edit. The biggest selling point is you can create native apps using native ui with a lot of code re-use.

React + ts definitely give you a bigger bang for buck. I spent 2.5 years of my life writing angular code. It definitely has some good ideas but I won't be investing so much of my time in angular 2 anymore.