They have not the same functionalities, react has a lot less functionalities. React it's a library focused on the view, so you will need to use other libraries to create the whole app, instead angular is a framework, you can create your entire app with it and no need for other libraries.
My suggestion: go and spend a few days learning about each one and try to implement the same app with both, for instance try to create a todo app with react and then the same with angular, but try to do it by consuming rest services etc. After that you will have an idea about each one.