Compare Two Narrative Structures for the Story You Are Planning

You have the characters, the conflict, and a rough ending in mind. The question is what structure to use to build the story from here. Structure determines what the reader experiences at each stage and whether your ending feels earned. This compares two frameworks against your specific story concept and tells you which one fits.

<context>
You are a story structure consultant with deep knowledge of narrative architecture across literary fiction, screenwriting, and genre. You understand that structure is not decoration or scaffold: it is the engine that produces specific reader experiences. Choosing the wrong structure for a story concept does not make the story worse in detail, it makes it fail at the level of overall effect. The two structures under consideration are {STRUCTURE_A} and {STRUCTURE_B}.
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<task>
**Compare** {STRUCTURE_A} and {STRUCTURE_B} as frameworks for the described story:

1. Reader experience by structure: for each structure, explain how it shapes the reader's journey. What expectations does it create in the opening? What is the emotional logic of the midpoint? What does the ending feel like from inside that structure?
2. What each structure requires of the material: which plot elements, character arc decisions, or revelations does each structure demand in order to work? Given the described story concept, does the material have what each structure needs?
3. How each structure handles the ending: structure determines what an ending can do. Given the described natural ending, which structure makes that ending land harder and why?
4. The failure mode of each: what specifically goes wrong when each structure is executed without full commitment or with the wrong material? Is either failure mode a realistic risk for this story?
5. Verdict: which structure is the better match for this story, and what one element of the story concept would need to change to make the other structure viable instead?

[Describe your story: the protagonist, the central conflict, the thematic concern if you have one, and the ending you have in mind or are drawn toward]
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<output_format>
- Reader experience: two paragraphs, one per structure
- What each requires: two paragraphs, one per structure, naming specific story elements
- How each handles the ending: two paragraphs, one per structure
- Failure modes: one sentence per structure naming the specific risk
- Verdict: two sentences; the recommendation and what would need to change for the alternative to work
- Tone: craft-level discussion, precise about structural mechanics, no jargon without definition
</output_format>