According to Drive, the best two power estate cars of this moment are the Audi RS6 Avant C7 and the Mercedes-Benz CLS 63 AMG Shooting Brake C218. When it comes to power, these two are about as equal with 560 bhp and 557 bhp. But, when you ask car journalist Chris Harris, the differences are pretty big. What are these differences? You will see that in the following ten minutes of the video!