How does the Audi A6's quattro all-wheel drive function differently from other AWD systems?

I've heard that Audi's quattro all-wheel drive is superior to other AWD systems in terms of performance and handling. Can someone explain what sets it apart?

Audi's quattro system uses a center differential to distribute torque between front and rear axles, allowing for better traction control and dynamic handling on various road conditions.

Unlike other AWD systems, Audi's quattro is a full-time AWD system, meaning power is always distributed to all four wheels instead of just when slip is detected. This results in better grip and handling in all driving situations.

One of the key innovations in Audi's quattro system is its self-locking center differential. This allows for a 60:40 torque split under normal conditions, providing a rear-wheel bias for better handling, but can adjust to a 40:60 split when needed for enhanced traction.