On the same £65,000 gross, a worker takes home roughly R$ 4.628 more per year in Brazil than in United Kingdom. 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 Kingdom 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 Kingdom uses a universal model — NHS provides universal care funded from general taxation, with private top-ups. 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 strong public welfare in United Kingdom, plus differences in pension capture, social safety nets, and city-level cost of living.