Slavic units, other architecture, etc.
Austrians are Catholics, Germans are Protestants (mostly) - this is one of the factors influencing culture. In addition, the Germans were the majority in the united Germany. Austrians were dominated by Slavs. Germany is too diverse to be limited to one civilization - all the more badly structured. The Germans should be divided into: Prussians, Swiss and Austrians (Bavarians and Westphalians possible).