What stack you use comes down to lots of variables. Both are very complete.

Both use MongoDB, Express, and Node. But the front-end is either made with React, or Angular.

• Angular is a complete application-design framework and development platform for building web and mobile applications. It’s written in TypeScript, an enhanced version of JavaScript that encourages a more structured approach to coding and can enhance code consistency and productivity.
• React is a JavaScript library that emphasizes simplicity, flexibility, and component-based architecture.

Personally I have found React easier to learn and I love the modular approach.