I see now.
I'm unaware of if one look or the other is objectively more favourable, but maybe I'm wrong? the first guy you posted appears to have exceptionally weak malars, perhaps even recessed. It's no wonder he doesn't have that "concave look" - which was really flat - that he had before. Also the photo of the model you posted is at a slightly different angle with his head tilted downwards, thus bringing the chin further back.
The second photo you posted never had that look to begin with, and has a chubby face. The third has two different angles creating that look. She's far more side on in the before.
Obviously there is an aesthetically positive relationship between strong cheekbones and jawline, but I don't think this is much to worry about.
Edit: Ok I see a bit more what you mean about with actual maxillary advancement affecting this. I'm guessing malar augmentation wouldn't alter this at all then, huh? Still I'm unsure about whether one look is objectively better than the other. Where did you read about this?