What is the difference between Audi's quattro and quattro all-wheel drive systems?

I am considering buying an Audi and I keep seeing the terms 'quattro' and 'quattro all-wheel drive' being used. Can someone explain the difference between the two?

Audi's quattro system is their famous all-wheel drive system that has been used in their vehicles since the 1980s. It provides superior traction and stability in all weather conditions, making it a great option for those who live in areas with varying weather. However, their new 'quattro all-wheel drive' system takes it to the next level with improved torque distribution and a lighter design.

The main difference between the two systems is that the quattro all-wheel drive uses a self-locking center differential, while the quattro system uses a Torsen differential. This means that the quattro all-wheel drive can continuously adapt power distribution between the front and rear axles, whereas the quattro system has a fixed ratio of 40:60 split between the front and rear.

In simpler terms, the quattro all-wheel drive system is more advanced and dynamic compared to the traditional quattro system. It can actively shift power to individual wheels, improving handling and cornering performance.