You can check the Vega 20 results over here, performance-wise the sample seems to be between the NVIDIA GeForce GTX 1070 Ti and GeForce GTX 1080.
VideoCardz writes it's unknown which part got tested. Perhaps AMD is indeed preparing a 7nm Radeon RX Vega, but at this point there's no way to know for sure...
Radeon Instinct cards lack display connectors, so the card tested here is either: Instinct engineering sample with display connectors attached, Radeon Pro Vega 7nm, Radeon RX Vega 7nm or… this is all fake and somebody is trolling (I have not yet seen a fake FFXV listing though).