Well, we all live and learn. According to a Wiki entry, there is a difference in the two, with the Turkish beans being darker and stronger in flavor than the Greek version. In any case, the word coffee with all of its variants is Arabic in origin. The brew was also first made by Arabs. It got to be called Turkish coffee over the Ottoman centuries, but in the wake of the Turkish invasion of Cyprus, there came to be also Green and Cypriot coffees. In the Balkans, by the way, the Serbs just call it coffee. In the Middle east, there is Arabic and Levantine coffee, while there are also Armenian and Macedonian coffees.