On the same 65 000 € gross, a worker takes home roughly $10,861 more per year in United States than in Finland. That gap reflects the tax structure alone — before rent, healthcare, or savings behaviour come into play.
Housing is the first multiplier. Finland has moderate rent pressure, while United States has high rent pressure. That keeps United States's nominal advantage closer to a real-world advantage.
Healthcare and pensions go in the opposite direction. Finland runs a universal healthcare model — Public healthcare via wellbeing services counties; private add-ons exist. United States uses a private model — Private, employer-tied insurance dominates; out-of-pocket costs can be significant. 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 comprehensive welfare state in Finland against basic public welfare in United States, plus differences in pension capture, social safety nets, and city-level cost of living.