What are the key differences between the Audi A3 Sedan and A3 Sportback?

I've been looking at the Audi A3, but I'm not sure which model to choose. Can you explain the differences between the Sedan and Sportback, both technically and in terms of design?

The main difference between the A3 Sedan and Sportback is their body style. The Sedan has a more traditional sedan design with a trunk, while the Sportback has a hatchback design with a larger rear opening. Additionally, the Sedan has a larger wheelbase and overall size, while the Sportback has a more compact design.