Maybe the commonality of soccer is the key factor!Doesn't this kind of remind you of a similar situation with artist Cliff Richard? He was wildly popular in the UK and several other places, but only a few of his songs got airplay over here. Same case with a Euro-Disco duo called Modern Talking: they were very popular in their native Germany, the USSR and some other Eastern European countries. The key word here is "disco" which likely explains why they are largely unheard of in the US. Also kind of reminds me of soccer (lol.)
In Latin America, where I have worked in all but two of the Spanish speaking countries, Cliff Richard was much bigger than Elvis. Not that Elvis did not have hits, it's just that Cliff had more. As I have mentioned before, there were lots of popularity differences such as CCR being bigger than the Beatles.