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

I am looking to purchase an Audi and I am not sure which type of all-wheel drive system I should choose. I have heard about the quattro and e-tron systems but I am not sure what sets them apart. Can someone explain the differences between these two systems and recommend which one would be better for me?

Audi's quattro all-wheel drive system is a mechanical system that distributes power between the front and rear wheels for better traction. On the other hand, Audi's e-tron all-wheel drive system is an electric system that uses electric motors to distribute power between the front and rear wheels. If you are looking for better performance and handling, I would recommend going with the quattro system.