What is the difference between the Quattro system and the S-Tronic gearbox in the Audi A4?

I am considering purchasing an Audi A4 and am confused about the various technologies they offer. Specifically, I want to know the difference between the Quattro all-wheel drive system and the S-Tronic dual-clutch gearbox and how they impact the car's performance.

The Quattro system is Audi's famous all-wheel drive system that provides better traction and stability on various road conditions. On the other hand, the S-Tronic gearbox is a dual-clutch transmission that enhances the car's acceleration and fuel efficiency. Depending on your driving needs and preferences, you can choose the version with either or both of these technologies installed.