Why did you use so many different variants of blue on the mouth portion of the mask?
It's seems almost random. Plus, it takes a lot away from the shape - it makes it look flat.

And in the middle of the brows (that lighter portion), the second one seems to be angled in the wrong direction.

And the highlighting for the black part is weird as well. It might look better if the base was a lighter color, and then you could also give it more depth.

I like the first one better, because if you squint your eyes it seems to have more shape than the second.

Please don't take offence to any of this, it's really only feedback ;]