I am ashamed to say I can’t distinguish American and Canadian accents if I meet people or hear them eg Mike Myers and Dan Aykroyd. Same with Kiwi and Oz (sorry OP). Tin ears perhaps unless others do too.
Don’t feel bad - this American usually can’t tell if someone is from one of the northern-tier states or Canada. And many of those snowbirds can’t tell my Texas twang from a Carolina drawl.