Visiting old city centre of Vienna is not only impressive by its architecture but also by the number of people in the streets and also horses with coaches. Comparing this place to Prague I would say there is more people, more tourists and more attractions generally offered by people as you are passing from the border of Vienna to its centre.
Arriving to Vienna, Austria we got out at the Maria Theresa Monument and there were two extremely nice buildings, museums one as another. One of them was Historical Museum of Applied Arts. Building itself is pretty huge and the details of its elaboration, wonderful.