Demography
It is possible that some differences between the two nations' politics may be ascribable to the existence of a French speaking population in Canada, which has no parallel in Australia.
In both countries, the nations' largest city is not its capital city, however they are capitals of the regions they are located in. In Canada, Toronto is the largest city and provincial capital of Ontario, while in Australia, Sydney is the largest city and state capital of New South Wales. Ottawa is the capital of Canada and Canberra is the capital of Australia.
Read more about this topic: Australia-Canada Relations, Comparison of Australia and Canada