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Who wins in the battle of people who beat the crap out of pre-nen Gon?
Since I'm not sure she knew nen back then, I can't give a proper answer. <_<
She beat up a pro hunter with 100 mercenaries ofc she knew nen.
As for a physical fight Hanzo is definitely stronger.
Hanzo Pre-Nen? Canary. Hanzo after Nen? Probably Hanzo.
For sure, but using the same argument we don't know Hanzo nen either. And since Killua rated him higher than him, I would say that Canary is a bit overpowered by him.