Earlier quoted context omitted.
"Comparable locations" is very subjective, but Vancouver vs Denver is one I've heard of that seemed convincing to me. Then again, I've never been to Denver.
Those cities are not remotely comparable. Vancouver and Seattle are a much better comparison. From a cursory search an average home in Vancouver is $CAD 1.1 mil and an average home in Seattle is $USD 800k. So once you take into account exchange rate they are actually fairly similar.
[1] Guess but not complete wild-guess multipliers