One important detail is that those country-based labels are at most abstractions or geographical terms. “Brazilian Portuguese” and “European Portuguese” aren’t actual, well-defined dialects; what people actually speak is local, in both sides. (e.g. “Paulistano Portuguese”, “Alentejano Portuguese”, “Estremenho Portuguese”, you get the idea.)

This is relevant here because I wouldn’t be surprised if plenty Brazilians never heard some of those. For example, “um polaco de cada colônia” only makes sense in Paraná, Polish immigration here was large enough to make some people call other immigrants “Poles”, even Germans and Italians. So the “Poles from each colony” are usually people/things that you might think that are related, but have zero to do with each other.