What is the difference between quattro and all-wheel drive in an Audi A4?

I'm considering purchasing an Audi A4, but I'm confused about the different drivetrain options. Can you explain the difference between quattro and all-wheel drive and recommend which one would be better for me?

Quattro is Audi's trademark all-wheel drive system which provides power to all four wheels at all times, providing better traction and handling. It's great for all-weather driving but may slightly decrease fuel efficiency.

All-wheel drive, on the other hand, is a broader term that encompasses various drivetrain systems where power can be transferred to all four wheels as needed. It offers better traction than front or rear-wheel drive, but may not be as efficient as quattro.

In an Audi A4, quattro would be the recommended option as it offers the best performance and handling, especially in adverse weather conditions. However, if you don't often encounter harsh weather, all-wheel drive may suffice.