How does the Audi A4's all-wheel-drive system work?

I've been hearing a lot about the Audi A4's Quattro all-wheel-drive system and how it enhances the car's performance. Can someone explain how it works and how it differs from other AWD systems in the market?

The Audi A4's Quattro all-wheel-drive system uses a mechanical center differential to distribute power between the front and rear axles. This allows for a 40/60 torque split, giving the car a more rear-biased feel for better handling and traction.

Compared to other AWD systems, the Audi A4's Quattro has a proactive layout, constantly monitoring grip and distributing power before wheels start slipping. This results in a smoother and more seamless driving experience.