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Dein, with only one example of each, I can't generalize about which is better- those of her smiling, or those of her not smiling.
But of these two, I prefer the first.
And yet... her smile looks a little forced to me. Considering the off-the-shoulder look, I suspect Hannah was trying to be a model. Smiling for a camera is a tough way to give a natural smile. As you know, I prefer the more natural smiles.