Interesting point. Australians sound like Americans to Brits, and like Brits to Americans
___________________________
Our daughter married an Englishman and spent a year working in England- on a phone help desk- so she talked to people all over the UK. They almost always thought she was from Canada!
I am an Alaskan and have driven through Canada numerous times. I have observed except for “aboot” for about, and “eh,” there is very little difference in the speech of an American and a Canadian (not the French Canadians, of course).