What are the differences between the Audi A8 and the Audi A6?

I am considering purchasing a new Audi but I'm torn between the A8 and the A6. Can someone explain the technical and performance differences between these two models?

The Audi A8 is a full-size luxury sedan while the A6 is a mid-size sedan. This means the A8 will offer more space and a smoother ride, whereas the A6 will be more nimble and fuel-efficient.

The A8 comes standard with a V6 engine while the A6 offers a choice between a four-cylinder or six-cylinder engine. If you want more power and acceleration, go for the A8.