A side-by-side comparison of the Bullmastiff and Mastiff across size, temperament, grooming, family fit, and more.
Bullmastiff
Mastiff
Overall, Mastiff wins more categories — but the right choice still depends on your family's specific needs.
Mastiff
1 win
Bullmastiff
0 wins
More family-friendly
These breeds score equally well with families.
Lower maintenance
These breeds require similar grooming effort.
Longer-lived
Calmer
Mastiff is generally more relaxed and lower-energy.
Quieter
These breeds bark about as much as each other.
More trainable
These breeds are equally trainable.
| Breed | Size | Weight | Height | Lifespan | Energy | Shedding | Grooming | Trainable | Affection | Barking | Kids | Dogs | Cats | Apartment | First-timers | Low-allergen |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Giant | 90–130 lb | 24–27 in | 10 yr | ✓ | — | — | — | — | — | |||||||
| Giant | 175–190 lb | 28–30 in | — | ✓ | ✓ | — | — | — | — |
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The Bullmastiff and Mastiff are both popular breeds, but they differ meaningfully in day-to-day life. The verdict above scores them on six key dimensions — use it as a starting point, then factor in your specific home, activity level, and family situation.
Overall, Mastiff wins more categories — but the right choice still depends on your family's specific needs.