There is no difference between an FBX 3D model and an FBX 3D model—both refer to 3D assets saved in the FBX (FilmBox) file format.
FBX is a widely used format that stores 3D data like mesh, textures, animations, and rigs, ensuring compatibility across software (e.g., Blender, Maya, Unity).
If you intended to compare FBX with another format (e.g., OBJ or GLB), note key differences: OBJ doesn’t support animations, while FBX does.