On the same 60 000 € gross, a worker takes home roughly 9182 € more per year in Portugal than in Netherlands. That gap reflects the tax structure alone — before rent, healthcare, or savings behaviour come into play.
Housing is the first multiplier. Portugal has high rent pressure, while Netherlands has very high rent pressure. That keeps Portugal's nominal advantage closer to a real-world advantage.
Healthcare and pensions go in the opposite direction. Portugal runs a universal healthcare model — SNS universal healthcare with low patient fees. Netherlands uses a public model — Mandatory private health insurance (~€140/month) with regulated coverage. 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 Portugal against comprehensive welfare state in Netherlands, plus differences in pension capture, social safety nets, and city-level cost of living.