I would add Austria and Czechia since 1945. They had about the same GDP/capita after WW2, but after the end of communist rule in Czechoslovakia in 1989, It was

I would add Austria and Czechia since 1945. They had about the same GDP/capita after WW2, but after the end of communist rule in Czechoslovakia in 1989, It was about 2-3 times higher in Austria.