While the 2018 Audi A8 might very well be the most technologically advanced car in its segment, this doesn't necessarily make it the best.
According to Carbuyer's review, the all-new A8 is a technological tour de force, and you certainly won't be disappointed with its interior quality or overall comfort, both on the road as well as inside. However, while it does rival the S-Class when it comes to offering a remarkably smooth ride, you could argue that the Audi doesn't actually look as distinctive as the Mercedes.
Surprisingly, this issue doesn't go away once you've sat behind the wheel, and it's because of all the tech - which, for example, can force you to take your eyes off the road since there's no rotary dial anymore for the infotainment system.
The review adds that technology doesn't equal luxury, and that while you can't really fault the A8 for anything else, its clinical interior and unassuming exterior get in the way of it nailing the top spot in the executive saloon segment.