Nvidia 2xxx series is also RTX so I imagine it should also look different, but it is still very strange regardless.
#The game appearance varies between RTX and non RTX GPUs.
golden raft
gritty marsh
It is build in technology of NVIDIA and Core Egine level Shadow rendering in UE4. It wont be for other Cards 
twilit warren
someone doesn;t know how stuff works.... they told people it was gonna be like this when ue4 first came out in KR
the only other solution is to use a filter software over the game like reshade.... also you can;t compare an older gpu to a newer gpu.... that's like comparing apples an oranges