Nobody is suggesting a Siberian Tiger would lose in a fight to a grasshopper mouse are they. Anyway, a tiger killing a mouse would not deem it even remotely 'hard', would it!
Still people are completely misunderstanding this competition after 10 years!
I would also argue that the climate you live in does not constitute a great deal to how hard something is. Creatures adapt and evolve to their climate.
It depends how you measure hard I guess, but for me its a personality trait rather than a capability trait.
This. Might as well just call it the "strongest and scariest apex predator competition".
ST has some hardness traits for sure, but anyone basing their decision on which animal would win in a fight is completely missing the point!