What is the difference between Quattro and All-Wheel Drive on the Audi A6?

I am considering purchasing an Audi A6 and I keep seeing options for Quattro and All-Wheel Drive. Aren't they the same thing? Which one should I choose?

Quattro is actually a type of all-wheel drive system developed by Audi. It uses a center differential to evenly distribute power between the front and rear wheels, providing better traction and handling. All-wheel drive, on the other hand, has a simpler system that only activates the rear wheels when needed. For the best performance, I would recommend opting for the Quattro system.