What are the main differences between an Audi A6 and an Audi A6 Avant?

I am looking to purchase an Audi A6, but I am not sure which model would be best for me. Can someone give me a breakdown of the key differences between the A6 and A6 Avant models?

The main difference between the Audi A6 and the A6 Avant is the body style. The A6 is a sedan, while the A6 Avant is a wagon. This means the A6 Avant has more cargo space, making it a better choice for those who need to transport larger items.