Likely because the badges that are on the cars are a branding rather than a description. To VW "VR6" is an engine from the early 90's, not a good marketing ploy to put that on the back of a brand new car 10 years later. On the flip side of that, the Audi TT is badged "Quattro", when it is infact a haldex 4wd system. Quattro is indeed an old name just like "VR6," but Quattro is the name of the very successful 4wd system that pretty much put Audi where they are today, so again a marketing ploy.