Over the weekend I kind of answered my own question by running both versions in main several times over the weekend. My system is less than a year old and runs the game well. When I fired up the DX9 version the only differe3nce I could see was latency would jump all over the place between -1.0 to +1.0 as regular as a heartbeat. But that could be my suspect Comcast connection. I am staying with the DX11 version even tho I don't have VR.