"Australia is the lowest, FLATTEST, and oldest continental landmass on Earth[4] and it has had a relatively stable geological history. Geological forces such as tectonic uplift of mountain ranges and clashes between tectonic plates occurred mainly in Australia's early prehistory, when it was still a part of Gondwana. Its highest peak is Mount Kosciuszko at 2,228 metres (7,310 ft), which is relatively low in comparison to the highest mountains on other continents."
https://en.wikipedia.org/wiki/Geography_of_Australia
Russia is big. Switzerland is small. And Africa has gets less snow than Canada. (Citations needed)
The basic route of this train (Newman to Port Headland) is a gentle slope to the coast. +175 and -700m over a 400km journey. (Google maps) Compare that to a route in western canada: Canmore Albert to Salmon Arm BC, the same distance but +2500m and -3500m.