What is the difference between Audi R8's Quattro and Quattro Plus systems?

I am confused about the different drivetrain options for the Audi R8. Can anyone explain the differences between the Quattro and Quattro Plus systems and which one would be better for performance?

The main difference between the Quattro and Quattro Plus systems is the torque distribution. The Quattro system distributes torque evenly between the front and rear wheels, while the Quattro Plus system uses a rear-biased torque distribution for better handling and performance.

In my experience, the Quattro Plus system provides better traction and acceleration due to the rear-biased torque distribution. However, it also adds weight to the car which may affect fuel efficiency.