Short answer
If you need pixel-level material fidelity for product pages (accurate metal reflectance, crisp gemstone facets, real sparkle, consistent angle/lighting), Leonardo generally gives better out‑of‑the‑box control for photoreal closeups. Midjourney excels when you want stylized hero or lifestyle shots and mood-based renders, but it can soften micro detail and hallucinate facets or highlights.

Recommendation
Use Leonardo for primary product shots (macro, catalog shots, 1:1 zooms). Use Midjourney only for contextual hero or marketing images where mood and composition matter more than absolute material accuracy. If budget allows, combine AI for ideation and 3D renders or studio photography for final product images.

Why (key differences)
- Material fidelity: Leonardo models tend to preserve sharp edges, microfacet highlights and fine textures more reliably. Midjourney can produce beautiful lighting but sometimes blurs tiny specular highlights or invents unrealistic reflections.
- Control & consistency: Leonardo supports tighter image conditioning, inpainting/upscaling and finer prompt controls that help you reproduce the same angle/lighting across SKUs. Midjourney is more variable (good for variety, worse for identical product shots).
- Speed & workflow: Midjourney gives fast creative iterations for mood boards. Leonardo is better for iterative refinement of the same composition and for maximizing resolution/detail.
- Artifacts: Midjourney may hallucinate patterns (strange inclusions, wrong facets), while Leonardo typically produces fewer small-scale material errors when prompted carefully.

Decision criteria (pick based on your situation)
- Prioritize absolute color, sparkle, and repeatability? Choose Leonardo or real 3D/studio photography.
- Need hero lifestyle images and fast creative variety? Choose Midjourney.
- Limited budget but must achieve e‑commerce standards? Use Leonardo and strict prompt templates plus inpainting/upscale workflows.
- Team size/skill: Solo freelancers will find Leonardo easier for controlled product consistency; larger teams should standardize templates or use 3D passes.

Practical checklist (for either tool)
1) Start with a photo reference: supply a high-quality reference image for angle, scale, and color. 2) Use precise camera prompts: “macro lens, 100mm, f/8–f/16, 1:1 crop, 50mm-equivalent for jewelry” and include lighting: “diffused softbox, 45° rim light, specular key, black velvet background” 3) Describe materials explicitly: “18k yellow gold, 0.5 ct round brilliant diamond, G color, VS2, realistic fire and scintillation” 4) Add negative prompts: “no text, no extra stones, no painterly brushstrokes” 5) Use seed/image conditioning and inpainting to fix facet artifacts. 6) Upscale and inspect at 100% for aliasing or soft highlights. 7) Proof colors on a calibrated display and compare to real swatches. 8) If multiple SKUs, save prompt templates and seeds.

Best‑for / Avoid‑if
- Best for Leonardo: close-up catalog shots needing micro-detail and repeatability. Avoid if you need highly stylized, painterly hero images.
- Best for Midjourney: mood-driven hero/lifestyle renders and quick creative exploration. Avoid if you need exact, repeatable product fidelity.

When to use real photography or 3D
If accuracy, legal color specs, and consistent scale matter (e‑commerce pages, returns), invest in 3D renders or studio photography—AI is great for concepts and secondary visuals but not always reliable as the single source for product accuracy.

If you want, I can write a starter prompt template for Leonardo tuned to close-up diamond/gold shots and a checklist for color-proofing.

Compare Midjourney and Leonardo AI