What is the difference between Audi A8's Quattro and Volkswagen Passat's 4Motion?

I am considering buying either an Audi A8 or Volkswagen Passat but I can't seem to understand the difference between their all-wheel drive systems. Can someone please explain?

The Quattro system in Audi A8 and 4Motion system in Volkswagen Passat both offer all-wheel drive, but they differ in their design and capabilities. Quattro has a 40/60 front/rear power distribution while 4Motion has a 50/50 distribution. Additionally, Quattro uses a center differential while 4Motion uses a Haldex clutch system. It's best to test drive both cars and see which one suits your driving needs.