This could really come down to personal preference or requirements for a project. Not entirely sure what you mean by opportunities/scope exactly, though.
I think popularity-wise, React is the clear winner right now. It has a vast community of dedicated developers and many many NPM modules available that work (sometimes exclusively) great with React for whatever needs you have.
However, Angular is still very solid and well-maintained by its core developer team & open source community. Here you'll be using more Angular-specific modules to get the job done, but it's more structured and full-featured than React.
React gives you a view/component rendering library, leaving you to add the packages you require from other sources. Angular gives you the same, plus routing, plus clearly defined strategies for some types of helper logic (services & pipes come to mind as useful ones). Both offer strategies for server-side rendering too if that's important for your requirements.
Both are (now) open source too, so most companies will have no issue using either and I think job opportunities are maybe now more in favour of React (excluding AngularJS, AKA: Angular 1), based on vendors & clients I've dealt with over the last year.