Though you have to be honest: Vega64 and GTX 1080Ti are not intended for 1920x1080, they are intended for 4K. The 1080Ti (750-$800) is significantly more expensive than Vega64 ($650-$699), even though Vega64 is still significantly higher than its launch price ($500).
Nvidia said the results were unexpected but did confirm the accuracy of the tests. “The ranking in Forza 7 is very unusual. Nvidia has confirmed [to] ComputerBase, however, that the results are so correct, so there is no problem with the system in the editorial regarding GeForce.”