Point out one distinctive detail in this image that makes this "anime" artstyle

Huge eyes being seen over hair.

Is this anime? It can also be used for below if you're strict.

And while on it, faces that can only be noticed as a character's because of different hairstyle, hair color, eye color, or facial paint/marks.

In fact, my fair opinion, is that this is what makes anime SUCK. I've seen some examples work out well, like 20th Century Boys. But that's the artist, you know.

So, this is anime? Same body frame, different colors and hairstyles.