What is the difference between Audi's Quattro Ultra and Ultra-Torque Distribution Systems?

I am researching about Audi's Quattro systems and I am confused about the difference between the Quattro Ultra and the Ultra-Torque Distribution systems. Can someone please explain the technical differences to me?

The main difference between the Quattro Ultra and Ultra-Torque Distribution systems is the way in which they distribute power to the wheels. The Quattro Ultra system uses a mechanical center differential to distribute power while the Ultra-Torque Distribution system uses a torque-vectoring system. This means that the Ultra-Torque Distribution system can distribute power more selectively and precisely, resulting in better overall performance and handling.

The Quattro Ultra system is a more basic version of Audi's all-wheel drive system, designed for better fuel efficiency and economy. The Ultra-Torque Distribution system, on the other hand, is the more advanced and high-performance version. It uses advanced sensors and computing power to constantly adjust power distribution and optimize handling in real-time. So if you're looking for a more economical option, go for the Quattro Ultra. But if you want the ultimate in performance, the Ultra-Torque Distribution system is the way to go.