just a few questions.
the cheapest new vega 56 in the biggest retailer in my country is just only 20€ less than an RTX 2060.
With Vega 56 you get 3 games: RE2, Division 2 and Devil may cry 5 i think. With RTX 2060 you can get BFV or Anthem code.
seen a lot of videos of Vega 56 vs RTX 2060. In the majority of games, wins RTX 2060 (except those particularly designed for AMD cards). Some games favour one or the other. but the hole picture is that RTX 2060 is better.
It also has a "new" technology for the future vs obsolete Vega tech. Also Vegas are hotter, less overclockable and much more power hungry than RTX.
the RTX 2060 oced is almost an RTX 2070 stock. I don't know why would you chose a card that is clearly worse than an Nvidia (unless you are in team red for the win) and don't care about any products from the competitors, which seems to be your case.
I would chose, ANY DAY OF THE YEAR an RTX 2060 over a Vega 56.