I remember someone on another forum say demo made UE4 look outdated but I don’t see anything UE4 can’t do or have. There’s a terrain system, time of day (blueprints), subsurface scattering (4.5 update), VFX/particles system, animation/ai, layered materials. The only thing really missing is the hair, although someone is working on a UE4 for it.
Not trying to start an engine war. What matters is how comfortable each artist feels when working with their respective toolset.