GLTF
- blender has built-in GLTF support
- GLTF format
- when exporting GLTF: it will create .bin file for geo data, .gltf for scene structure description, tex folder for textures
- it is good for you want to replace texture later on, or just manual edit texture source path in gltf text file.
- GLB format
- it is basically above in one packed file called GLB.