Did you do something different or new? The render quality looks smoother, higher rez, maybe a bit shinier too. Extra clean overall. Especially the hair, skin, and scarf.
Yes, I made a texture test in Photoshop (from normal I turned it to HQ which fit some textures like f.e jeans) and I made skin texture more blurred to remove some dots which makes quality lower. From now I will start to use it I hope Resolution and High Quality are the same as before