Round 1: Getting in
Draw
Uzbekistan: visa-free on a passport. Since 1 February 2019 Portuguese passport holders need no visa for stays under 30 days; longer stays need a visa arranged in advance. Kazakhstan: visa-free on a passport. Visa-free entry and stay for tourism or business up to 30 consecutive days; longer stays need a visa from the embassy. A dead heat: 30 days visa-free in both, and neither asks for registration on a short trip any more.
Rule: Fewer hoops wins: ID card, then visa-free, then on-arrival permit, then e-visa, then consular visa.