What is the difference between Audi A6 Quattro and S-Line models?

I am interested in purchasing an Audi A6 but I am unsure of the differences between the Quattro and S-Line models. Can someone provide an explanation?

The main difference between the Audi A6 Quattro and S-Line models is their drivetrain. The Quattro model has all-wheel drive, while the S-Line model has front-wheel drive. This means that the Quattro model will provide better traction and handling in difficult driving conditions, while the S-Line model may have better fuel efficiency.