Snow and cold vs. sun and heat as the primary environmental issues to deal with, as a quick example.
But also humidity, local ordinances, matching the style of surrounding buildings, the relative value of land favoring single story (texas) or tall (Calgary) houses
Relative value of land and matching style is semi valid. However none of that prevents you from take a house from one area and building it in the other. In most cases local ordinances will allow it though it will cost slightly more as builders are not familiar with some details and some materials might not be readially available. However the design itself will still work if you want to.
But also humidity, local ordinances, matching the style of surrounding buildings, the relative value of land favoring single story (texas) or tall (Calgary) houses