What is the difference between quattro and all-wheel drive in the Audi A5?

I've been researching the Audi A5 and I see that it offers both quattro and all-wheel drive options. Can someone explain the difference between these two options and how they affect the driving experience?

Quattro is Audi's branded version of all-wheel drive. It utilizes a unique center differential to distribute power between the front and rear wheels, providing better traction and handling in various driving conditions.

All-wheel drive is a system that distributes power to all four wheels, providing better traction and stability in adverse weather conditions. Audi's all-wheel drive system is designed to improve driving dynamics and performance.

The main difference between quattro and all-wheel drive is their underlying technologies. Quattro is a permanent all-wheel drive system that sends power to all four wheels all the time, whereas all-wheel drive can sometimes be switched off to achieve better fuel efficiency.