I lived in the US before making a move to Canada. There are actually some comparison threads on the forum i believe, you might have to search them though.it is a shame that not many people are here who are currently residing in Canada and lived in the US past. I would love to see a quality of life comparison for relatively high earners.
In a nutshell, the standard of living in the US will generally be higher, but quality of life in Canada will be higher.