I'm not so sure. If we are talking about the advantage in terms of the advantage in enhancing scientific knowledge, then certainly things have changed since WWI

I'm not so sure. If we are talking about the advantage in terms of the advantage in enhancing scientific knowledge, then certainly things have changed since WWII but pre-WWII, if my knowledge of history is correct, the majority of advances in theoretical science and mathematics happened in Europe. Even today a large number of scientists working in America are foreign-born. Now I don't know how much people trusted science and the scientific consensus in Europe vs America back then but I wouldn't be surprised if Europe was more progressive back then either.