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

I am looking to buy a luxury sedan and was considering the A7 and A8 from Audi. Can someone please explain the key differences, such as performance, features, and price?

The biggest difference between the Audi A7 and A8 is their size and power. The A8 is larger and more powerful, with a longer wheelbase and a stronger engine. However, the A7 offers a more sporty and agile driving experience, with its sleek design and advanced handling technology. In terms of features, the A8 typically comes with more advanced technology, such as a larger infotainment screen and enhanced safety features. As for price, the A8 is more expensive due to its larger size and premium features.