On the same $90,000 gross, a worker takes home roughly $1,368 more per year in Canada than in United States. That gap reflects the tax structure alone — before rent, healthcare, or savings behaviour come into play.
Housing is the first multiplier. United States has high rent pressure, while Canada has very high rent pressure. That keeps Canada's nominal advantage closer to a real-world advantage.
Healthcare and pensions go in the opposite direction. United States runs a private healthcare model — Private, employer-tied insurance dominates; out-of-pocket costs can be significant. Canada uses a universal model — Universal provincial healthcare; dental and drugs are typically private or employer-paid. The country with lower take-home often shifts costs that the other country leaves to your private budget.
Net-of-everything, a relocation decision should weigh basic public welfare in United States against strong public welfare in Canada, plus differences in pension capture, social safety nets, and city-level cost of living.