What are the key differences between the Audi A7 and the A6?

I am considering purchasing either the A7 or A6 from Audi but I'm unsure of the differences between the two models. Can anyone provide a break down of their features and benefits?

The main difference between the A7 and A6 is their body styles. While the A6 is a traditional sedan, the A7 is a sportback with a hatchback design. This gives the A7 more cargo space and a sleeker appearance.

Another key difference is their engine options. The A6 is available with a four-cylinder or V6 engine, while the A7 offers a more powerful V6 or V8 engine.