Iris face is from a newer model i think, more polygons were used to construct Iris's face than Alexis and Erynn.
For me she still loses because of the eyes and the short hair.
The quality of renders is variable, sometimes the girls may look better or worst.
This is specially true when you go from recent remakes to old stuff(some of those are rough).
This shot for example isn't doing the best job to highlight Erynn's eyes(the shinnier they look the better IMO), some others do it better.
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All this is a moot point because while i do feel something for Iris, my feelings for Erynn are much stronger... not solely guided by my dick, only partially
Something like that is gonna hit her super hard if you are in the starting stages of a relationship, more than the simple "she yells at you and calls you an asshole", these are the 2 people she trusts the most in the world.
Potentially it could get really dark