Convert irr to x

What is the difference between .irr and .x?

Description: Irr is a 3D scene file type associated with the Irrlicht 3D engine, used to create interactive 3D applications and games. Irr files are binary files that contain 3D models and textures, as well as other resources such as animations, particles, and lights.; X is a DirectX Model image file used by DirectX technology which is for 3D graphics rendering in games. The file format specifies 3D object structures for meshes, textures, animations, and objects.