The differences between Mongolian Mastiff and Tibetan Mastiff:

1. Different body shapes: Tibetan Mastiff looks fatter, while Mongolian Mastiff looks relatively small.

2. Different living environments: Mongolian mastiff, also called Mongolian dog, comes from Mongolia, and Tibetan mastiff comes from Tibet.

3. Different nasal cavities: The Tibetan Mastiff lives in plateau areas where oxygen is thin, so its nasal cavity and chest cavity are wider than those of the Mongolian Mastiff.

4. Facial differences: The Mongolian Mastiff’s mouth is more pointed than that of the Tibetan Mastiff, and its coat color is also more complex.

5. Different personalities: Tibetan Mastiffs have more primitive animality, while Mongolian Mastiffs are more loyal and docile to their owners, and Mongolian Mastiffs have a stronger team spirit.