* Bite force measurements are difficult: While there have been attempts to measure bite force in both animals, it's a complex process with varying results depending on methodology.
* Bite force isn't the only factor: While bite force is important, it's not the only factor in determining the effectiveness of a bite. Other factors like jaw size, teeth shape, and bite mechanics also play a significant role.
* Individual variation: Just like humans, individual animals within a species will have variations in strength and bite force.
However, here's what we can say based on available information:
* Hyenas have a strong bite: Spotted hyenas are known for their incredibly powerful jaws, which they use to crush bones. Studies have estimated their bite force to be around 1,000 PSI.
* Neapolitan Mastiffs have a strong bite: While not as high as a hyena, Neapolitan Mastiffs have a strong bite force, typically in the range of 500-700 PSI. They have a larger jaw size and heavier build compared to most dogs, contributing to their bite strength.
Conclusion: While hyenas are generally considered to have a stronger bite than Neapolitan Mastiffs, it's impossible to say for certain without more precise and consistent measurement data. It's also important to remember that bite force is just one aspect of a creature's bite effectiveness, and both hyenas and Neapolitan Mastiffs possess powerful jaws.