I might be wrong but the last time I checked most German car manufacturers share the same suppliers.
Bosch, Hella, Borg-warner, etc
Isn't the Volkswagen group the largest car manufacturer?
http://autos.yahoo.com/articles/auto...est-automaker/
S4 and 335 are both really nice cars from two respectable brands BMW and Audi.
Everyone should just go to their local dealer and test drive both cars with an open mind then come back and make a civil discussion because right now this seems to be a bashing thread.