|What is it?||A small View library||A full MVC framework|
|DOM||Virtual DOM, updates faster since it only update the changes.||Regular DOM, updates slower as it updates the entire tree structure.|
|Data Binding||One way binding. Model -> UI changes only.||Two way binding. Model -> UI changes, UI -> Model changes.|
|Mobile||React Native is faster||Iconic and Cordova are slower|
|Testing||Jest & Enzyme||Jasmine & Mocha|
|Learning Curve||Lower, but it is only the view. You will have to learn other 3rd party libraries for the M and C.||Higher with the entire MVC framework|
|Size||Smaller, so a bit faster to load||Larger, longer load times and performance in mobile|
|Introduced by||Facebook, 2013||Google, 2016|
As far as popularity, here is the latest google search trend for the past 5 years from google trends.
Which one should you use for your project? It really depends on your specific project. Best is to do a small POC with both so that you can see the pros and cons.