When comparing Crafty.js vs Paradox 3D, the Slant community recommends Crafty.js for most people. In the question“What are the best 2D game engines?” Crafty.js is ranked 34th while Paradox 3D is ranked 62nd.
Ranked in these QuestionsQuestion Ranking
Easy to learn, based on Entities and Components, the later being class-like objects that entities inherit.
Has open function binding systems, allowing easy creation of custom components.
Pro Good looking and fast
Looking nearly as good as Unreal Engine 4, but rendering significantly faster.
Pro Straightforward editor
Paradox provides a simple and clean working environment for designing games.
Pro Visual Studio integration
Pro Free and open source
Con No IDE
If you like having some huge GUI akin to Gamemaker, Unreal, Unity, etc, Crafty is not for you.
Con Requires a Xamarin license for mobile development
$25/month for each platform.