In Shakespeare's "A Midsummer Night's Dream," the choice to frame the fable as a play within a play signifies a different feeling for the audience compared to the source material. This framing device not only adds a layer of comedy and self-awareness to the performance but also allows for a more playful exploration of themes such as love and transformation.
By presenting the story as a play performed by the "rude mechanicals," Shakespeare invites the audience to engage with the narrative in a lighthearted way, emphasizing the absurdities of love and the theatrical nature of existence. This metatheatrical element contrasts with the more straightforward storytelling typical of fables, creating a distinct atmosphere that is both entertaining and reflective.
Therefore, the correct detail that signals this difference in audience experience is the choice to frame the fable as a play within a play.