Much of the difference in the example of Turks is captured by the Muslim family background question.

Much, but not most. Religion is easy to ascertain, but there are other cultural differences which are more difficult to classify, but still are signigicant *. Substitute Turks with Egyptian Christians and the example will still work. (And not because of theological differences between Coptic and Protestant Christianity.)

*) Among the culturally determined attributes are: political opinion, musical taste and general aesthetic preferences, favourite food, familiarity with different literature and films, ways of relaxation, knowledge of geography and history, language(s), moral code. Most of these things are independent of religion or only very indirectly influenced by it.