It is not even close...the one on the left looks far better. Lighting is a bit basic on her face, but is there actually any SSS? If there is it is pretty poor in comparison. Unity character's are well below what was shown in U4. Skin shader looks a bit weak. Her hair is the most impressive thing about her...Everything else is not that impressive (well impressive for an open world game to be sure and a big leap for AC).
You're seeing a grab from a highly compressed source. And then, just her face.
I promise there's an intricately dressed body in that scene. I'll find a better shot for you.