Ah ok ok. My fault. I thought you were talking about your uncle's dog's breed against retrievers and some other type of bully but you were talking about your uncle's dog in particular against other bully kutas and retrievers.
This unpredictability in the breed is exactly what keeps me away from them.
That sucks. Pets are amazing.
Either that or you selected the wrong picture from the internet, willy nilly. They're both quite different. Btw did you know that "Pit Bull" isn't a breed?
All Pit Bull breeds (American Pit Bull Terrier, American Staffordshire Terrier, American Bully and Staffordshire Bull Terrier) have a squarer face with a shorter muzzle and relatively taut skin, especially around the face and neck. The neapolitan mastiffs, or pretty much all mastiffs for that matter, have loose hanging skin with elongated muzzles and a more narrower face. The Bully Kutta is also a mastiff and the loose skin puts the 'Bully' in the Bully Kutta. It also is the first thing which let's you distinguish between a Bully and a Gull Dong which are often erroneously claimed to be Bully Kuttas. You can clearly see what I'm talking about.
American Pit Bull Terrier,
American Bully,
Neapolitan Mastiff,
Bully Kutta,
Which does the guy in your pic belong to?
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After 30 years one would think that it'd be easy to differentiate between terriers and mastiffs.