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 ...

For all the awesomeness that React brings to the table, getting started with it is not the most straightforward process. It has a steep learning curve filled with many small and big hurdles. Here ...

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.