The Czechs always had more players when it came to the joint representation of Czechs and Slovaks.
Because there are 11 million Czechs and only 5.5 million Slovaks, the selection was larger in the Czech Republic. The only exception, in my opinion, is the year 1976 and the European Football Championship, I think there were eight Slovaks and only three Czechs in the basic line-up. In hockey, I always thought the opposite, 5-6 Slovaks and 15 Czechs. And there were also many more coaches on the bench from the Czech Republic. Czech hockey was better, it had more top teams with a long tradition. I don't know if you know teams like Kladno, Litvínov, Pardubice, Dukla Jihlava, Brno ... Slovaks only had Slovan Bratislava, Trenčín and Košice. Jihlava and Trenčín were army teams, which in practice meant that if he was a very talented junior and had to retire for two years, then the two teams had the primary choice. Army teams had the best facilities in all of Czechoslovakia, similar to CSKA Moscow during the Soviet Union.
The Stastny brothers, Darius Rusnak, Jozef Golonka, Vladimir Dzurilla, Vincent Lukac, Jan Starsi ... were the most famous and best Slovak players in the Czechoslovak era. Maybe I didn't forget anyone.