Canadians have experience fighting in a desert environment. Australians have no experience fighting in a winter climate.
They do get snow in the mountains and have plenty of places for ski tourism so I don't see why that couldn't happen.
Last I checked Canada only has one true hot desert so it would be about the same for both conditions.
But like you said it would be home advantage and the time of year as summer would be warm enough for Australians in Canada and winter warm enough for Canada.
As for the other SK would zerg rush japan.

Canada could draft the sheep and make them a fighting force with special skills like entertaining the troops with their behinds.
They get snow at the tops of mountains sure, but they don't have winter. Russia messed up a lot of armies over the years just by retreating into Russia during the winter.
I think the desert experience for Canadians refers to troops being in Afghanistan.
What I want to know is who would win between Canada and Australia if Aussie rules football were played on ice with skates.![]()
It's Australia that has the sheep. We have the Moose.
And I'd say Japan beats South Korea. Japan's "defense force" is one of the largest militaries in the world, and they have a large air force. Also, South Korea's primary threat is land based, while Japan has to worry about the sea or air, so Japan should have the stronger air force and navy imo.
I say Australia beats Canada, because they actually have a navy and could shut down a Canadian invasion and blockade Canada...which gets most of its trade from the US via land. I don't think either nation could mount a successful invasion of the other.
And I'd say Japan beats South Korea. Japan's "defense force" is one of the largest militaries in the world, and they have a large air force. Also, South Korea's primary threat is land based, while Japan has to worry about the sea or air, so Japan should have the stronger air force and navy imo.
I was thinking of the blockade angle, but how do you blockade a country the size of a continent? The Axis powers couldn't stop ships from getting to tiny Britain. Technology has come a long way, but the physical realities still apply.
Also, I don't think the Australian navy is actually bigger than the Canadian one. Better at amphibious landings for obvious reasons but otherwise of comparable size and makeup.
Would blockade even matter if outside help is not allowed in this situation?
economically or militarily?
Militarily the Koreans would win because of starcraft