The qualitative difference between the two genocides is that the Ottoman Empire (which, although the Emperor and the central government were predominately Turks, included many other ethnicities) "expelled" the Armenians, basically by driving them out into the desert to die (with exceptions), while those involved in the killing of the Jews, Gypsies, homosexuals and others took a more active part in their deaths. The end result, of course, is much the same.