No, you're absolutely right. I guess it is an optical illusion (or a delusion,) on my part. Wanda's eyes are such a pale blue that they look a little strange to us 'Murricans; living in Sweden you probably see lots of eyes like hers.

The only other thing I can really think of is, less of the sclera or whites of Wanda's eyes show toward the bridge of her nose. Majka's eyes are set about the same distance apart, proportionally. More of her inner sclera are visible, and her darker irises give her eyes a warmer look.

The focus point of their gaze can be adjusted as well, so the amount of sclera visible in a given picture can differ (but yes, here we have their default straight ahead gaze).

Fair-colored eyes and hair are common not only in Scandinavia, whole swath of Europe starting with Germany and stretching north and east all the way into Russia is like that. It's interesting though, that Wanda's eyes are actually green (most rare color, but it exists), can even be evidenced with RGB data - yet people commonly call them blue! Also, I imagine how the unusual color scheme of dark face and light hair can look confusing, but I chose it precisely for this contrast.

And there's more at play, as always. The 3D graphics can have much in common with photography. Not only camera settings. The phenomenon of trying to get "the perfect shot", having to go through dozens attempts in the process, applies here as well. Lighting setup, camera angle, focal length, all this contributes to the final effect. And so, as much as in actual photography, some shots of exactly same subject may actually turn out less flattering than others. I think that's what may be going on here, not entirely an illusion.

All this makes me realize, I need to educate myself more on the topic of photography, especially portrait-related.

Nods to you on this.