What are the key differences between the Audi A7 and A8 models?

I am looking to purchase a new car and I am debating between the Audi A7 and A8 models. I am specifically interested in knowing the major differences in terms of performance, technology, and design. Can anyone provide a comprehensive comparison of these two models?

The Audi A7 is known for its sleek and sporty design, with a more aggressive front grille and sloping roofline. On the other hand, the A8 offers a more classic and luxurious design, with a longer wheelbase and higher level of refinement.

In terms of performance, the A7 has a wider range of engine options, including a high-performance RS7 model. However, the A8 offers a smoother and more comfortable ride, especially in its higher trims with adjustable air suspension.