Your “Staffordshire Terrier” looks like a pit bull because it is a pit bull. Or were you saying it is tall for the pit bull type of dog?
A “pit-bull terrier” is not a breed, it is a type. Like greyhounds. Just because it doesn’t use the name doesn’t mean it is not part of a group of similar dogs.
In AKC there are Staffordshire Bull Terriers, American Staffordshire Terriers. These 2 are the only remaining true “PBT” types recognized. However, Bull Terriers and Boston Terriers are also technically PBT types, but the evil has bee bred out of them. So too Bulldogs which are the basis of PBTs without the terrier tenacity - but they were still the basis of the nasty sport of bull-baiting (bulls are NASTY creatures). “Bully” breeds if you will, but some have been made reliable for 100 years or so.
If I know any Staffy is AKC-show oriented, I would trust it pretty well. But I don’t know on the surface - you’d have to show me proof.
Here are the other 3; you can see the puppy is all grown up. A Heeler mix. She likes to lay on top of the back of the couch like Snoopy on his doghouse.
They are all so different but at the same time; very loyal and loving.