What is the difference between quattro and all wheel drive on the Audi A4?

I've been considering purchasing an Audi A4, but I'm not sure about the difference between the quattro and all wheel drive options. Can someone explain the technical differences and which one would be better for my needs?

Quattro is Audi's specific term for their all wheel drive system, which uses a center differential to distribute power to the front and rear wheels. It offers superior traction and handling in a variety of driving conditions.

All wheel drive is a more general term for a system that distributes power to all four wheels, but does not necessarily have a center differential like Audi's quattro system. It's a good option if you live in an area with mild weather and don't need as much traction.