Hello. I don’t know much about cellular bands - which product is more appropriate for Europe? East Europe precisely? (Poland)
LTE version is better.
4G version covers only 3,7,20 international bands, while LTE version additionally covers 1,8,38,40, that are also frequently used in Europe.
LTE is more “Europe” friendly … at least the FDD bands are complete on LTE while 4G lacks a few (B1 and B8).