Angular vs React

Angular

abundant resources and support: Google offers a rich treasure trove of resources and rolls out new updates and improvements every 6 months;
component-based architecture is a key concept;
scalable for huge teams;
big community;
a lot of experienced developers.

difficult syntax: Angular has made a big leap in terms of syntax complexity after adopting TypeScript in Angular2 and beyond. Yet it poses a steep learning curve for anyone making a transition from vanilla JS.
steep learning curve: Angular has the steepest learning curve and suffers from a very high rate of abandonment. A large base of angular users has moved to Vue and react.

easy to maintain isolated components in React and they are easy to reuse;
convenient architecture – Flux – is highly competitive to MVC. One-way data flow provides maintainability and efficient arrangement of data and DOM elements;
lightweight among the ones that are widely used today;
component-based architecture can be implemented;
ranked 1st most popular front-end javascript framework in State Of JS survey;
backward compatibility – Transitioning or migrating from older to new versions is fairly easy in react using CodeMods;
rich community;
a lot of experienced developers.

use JSX proprietary technology (add extra abstractions over HTML);
Not a complete solution. (To have a complete solution React should be used with other staff like Routing, State management system, etc.)
Not opinionated in terms of an application structure. Code organization methodology should be defined at the beginning of the project.