Marcopolo Viale can receive different configurations. It range 12 meters to 28 meters, with or without articulations, and can equipped with others differents engines: Mercedes, Scania, Volkswagen. Usually, he's used in BRT lines. Great top list. Greetings from Brazil.
You forgot the Neoplan JumboCruiser, which was/is an articulated, double-decker bus manufactured in Germany. 10+1 buses were built in total (the last one being a heavily redesigned model). The series failed to catch on due to their high prices, costing almost 2.5 times as much as a contemporary standard double decker bus. There were also several other articulated double-decker prototypes, however only Neoplan built a small series of these vehicles. You can find articles on Wikipedia (translate the German one for the most information
The buses produced for Brazil (Volvo and Scania) are not produced in Sweden. Volvo has factories in North and South America for these types of buses. For example, Volvo has a bus factory in Curtiba, Brazil.
Correction: The 9800 is exclusive to the Mexican market (as it is the local successor to the 9700). As such, the bus is manufactured in Volvo's plant in Estado de Mexico.
Cool the first 2 busses (the Setra and the Van Hool dubbledecker) are operated by our regional busoperator Qbuzz in Groningen, The Netherlands. They have A stunning dark Blue livery!