On the same $90,000 gross, a worker takes home roughly R$ 9 more per year in Brazil 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. Brazil has moderate rent pressure, while United States has high rent pressure. That keeps Brazil's nominal advantage closer to a real-world advantage.
Healthcare and pensions go in the opposite direction. Brazil runs a universal healthcare model — SUS universal healthcare; private cover used by middle and upper income. 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 strong public welfare in Brazil against basic public welfare in United States, plus differences in pension capture, social safety nets, and city-level cost of living.