A is better because it answers the seam question more directly and stays closer to visible evidence. B becomes less reliable by naming a specific seam finish and fashion associations that the image alone does not clearly support.
Option A provides a superior response since it addresses the seam inquiry in a more straightforward manner and relies on what can actually be observed in the image. Option B loses credibility by identifying a particular type of seam finishing and making fashion-related claims that cannot be definitively confirmed from the visual evidence alone.