Australia vs Canada Migration

Guys

I read through all the posts and would love to get some details for these questions

Can any of guys compare australia and Canada from the point of view

1) Salary ( IT positions if possible)
2) Cost of Living (Food. Housing)
3) Taxes, Health Benefits
4) Employment Opportunities

Australia seems to have a bit of everything however the Canadian currency is slightly stronger and the tax brackets seem to be lesser than Australia. Can someone please share their personal experiences?

Thanks