I think it's apples to oranges to compare Calgary to Toronto. Toronto is going to be much more dense, for a variety of reasons. It's an older city, it's a much larger city, and geographically its core radiates 180 degrees outwards. Toronto is massive and despite what some forum folks on Urban Toronto might say...it's a global city.
I would compare to cities like Edmonton, Winnipeg and Ottawa. More-so Edm and Win, as they are prairie cities of similar age. Or compare Calgary to places like Buffalo, Oklahoma City or Hartford. I think we do very well in these types of comparisons.
I do understand where
@gsunnyg is coming from and the city can still work on improving the vitality of its core.