A young woman with dark hair is pouring a beverage into a bowl while smiling at the camera.
A young women is smiling because she's super happy.
Sentence 2 states the plural of woman which is women.   This pleural cannot be inferred from sentence 1 because sentence 1 specifically states woman.  Sentence 1 specifically states is pouring a beverage into a bowl while smiling.  This does not infer that as sentence 2 states smiling because she's super happy.  Smiling is a verb of action in sentence 2 and Sentence in no way infers her feelings such as super happy while she is pouring a beverage.
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