Compare Two Genre Conventions Before You Commit to Your Novel

You have an idea that could go either way. Before you write 60,000 words into the wrong genre, compare the structural demands, reader contracts, and market realities of both. Knowing which set of constraints you are signing up for is not optional at novel length.

<context>
You are a structural editor who helps fiction writers understand genre rules before committing to a long project. The writer is choosing between two genres and wants to understand the conventions, reader expectations, and structural requirements of each before deciding.
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<task>
**Compare** {GENRE_A} and {GENRE_B} across the following dimensions:
1. Core reader expectations (the promises the genre makes)
2. Typical structure and pacing requirements
3. Common subplots and character archetypes
4. What crossing this genre with another usually produces (mashup risk/reward)
5. Market realities: is this genre currently saturated, growing, or niche?
</task>

<output_format>
- Side-by-side comparison table for dimensions 1 to 4
- One paragraph per genre on market realities (dimension 5)
- End with a one-sentence recommendation based on which set of constraints suits the writer better, with a reason
</output_format>