One is a young, free upstart offering. One costs money and is part of a comprehensive, established online learning site. Here's a comparison of my experiences with React.js Fundamentals by Tyler ...

To start, I’ve bootstrapped a React project with create-react-app and added a few dependencies: react-vis, d3-fetch to help pull in the CSV data, and moment to help with date formatting.

React is not an end-to-end JavaScript application framework. It has no support for models or controllers, although there are projects related to React that cover these functions, along with routing.