<ul><li><a href="http://video.google.com/videoplay?docid=-6241977512209030164&amp;q=rs4&amp;pl=true">http://video.google.com/videoplay?docid=-6241977512209030164&amp;q=rs4&amp;pl=true</a</li></ul>

Click on RS4 for search. Then listen to the top right hand corner Test Drive (UK / Europe) then listen to the US one (Audiworld)

US sounds weak sauce compared to the European one ?

There are a number of things that could cause that, ranging from microphone type and positioning to whether the driver pushed the "S" button or not.

sweet car none the less