What is the main difference between the Audi A7 and other models in the A Series?

I am considering purchasing an Audi A7, but I am unsure of what sets it apart from the other models in the A Series. Could someone provide insight on the key differences?

The main difference between the Audi A7 and other models in the A Series is the A7's fastback design. This gives it a more sporty and sleek look compared to the traditional sedan design of other A Series models.

Another key difference is the A7's larger size and more spacious interior. This model is designed for those who need more room and luxury in their daily commute.

While other A Series models come standard with front-wheel drive, the Audi A7 offers a quattro all-wheel drive option for better handling and performance in all types of weather and road conditions.