At that resolution both cards are more than adequate.
Some benchmarks I pulled up at 1920x1080
Dying Light.
NV 55FPS vs AMD 44FPS.
Gta V: NV 78 vs AMD 66.
DOOM NV 83 v AMD 110
DAYZ 27-55 both cards depending on area.
Dead by Daylight 40FPS both.
Your other games are super easy to run.
Main game to consider is Dying Light. Nvidia will help you there, although you probably won't be able to tell the difference between 50 and 60FPS.
Notes: Doom in OpenGL suits Nvidia slightly, but RX 480 gets huge boost from Vulkan.
DayZ will give better results next year. I was talking to a dev and beta coming soon will improve FPS.
Not sure if Dead by Daylight is locked at 40FPS or not.
Main rule is Nvidia better for...