The sauce is different. That’s all I can really say. I was shocked and horrified when i tried American beans. You’d think Heinz would be Heinz. As for pork. That was also odd.
They're the same.
You probably had "Pork & Beans" which is what most Americans think of when they think of canned beans.
Pork bits of all kinds are used in the US to flavor beans, soups, greens. We put a smoked ham hock or turkey wing in our collard greens; without them the greens wouldn't be worth eating.