eishes chayil in training, the gemara’s point is to find a match close to your background.
i will give another example in addition to BT-FFB and sfardi- ashkenazi that i think are not the same backround and will cause unneeded friction: FFB american to an FFB israeli. there are big differences in mentality between the two . not a good idea. also i heard from a great rosh yeshiva that he holds that despite a common language, American and British is not a good choice. cappeesh?
we are not trying to find a match in every category ! that is the wrong approach and a shtus! marriage is about putting two DIFFERENT people together,which is hard enough! there is no mitzvah to make your life even harder by choosing a partner who comes from a different planet altogether.