Both have the same dll hardcoded name Esri.ArcGISRuntime.dll
When i try only 1 of the 2 is loaded, even if i force Assembly.LoadFile, it is loaded in the appDomain but cannot use it got:
LOG: The same bind was seen before, and was failed with hr = 0x80131040
I don't believe you can as even if you get both to load in your project, both dlls will contain similarly named assemblies that would overlap and cause other issues when attempting to reference one specifically.