Short answer / recommendation
If your priority is consistent, fast, cost-effective production of many static ad variants for Facebook/Instagram, lean toward Leonardo for scale and workflow features. Choose Midjourney only if you need the absolute highest-artistic, stylized visuals and you have the budget and prompt-engineering bandwidth to polish them.

Why (decision criteria)
- Visual quality: Midjourney tends to produce more painterly/stylized, high-end-looking images out of the box. Leonardo can produce excellent photoreal and commercial-ready results but usually trades a bit of “artistic flair” for cleaner, repeatable outputs.
- Speed & iteration at scale: Leonardo’s product is built around batch generation, templates, inpainting and faster local/credit-based runs that make sweeping iterations and A/B variants cheaper and faster. Midjourney (Discord-based) works well but is slower and more manual for high-volume workflows.
- Consistency & brand control: Leonardo typically gives easier tools for templates, brand kits, and inpainting (logo placement, exact backgrounds) which helps keep creatives consistent across ad sets. With Midjourney you can get consistency but it usually requires more prompt engineering, reference images, and seed management.
- Cost: Leonardo is generally more cost-efficient at scale (cheaper credits/batch workflows). Midjourney subscriptions give unlimited-ish access but per-image quality settings, upscalers, and the time needed to iterate can increase cost in person-hours.
- Licensing & production fit: Both platforms support commercial use, but check the current TOS and export options for your team. Also verify output resolution and upscaling if you need specific pixel sizes.

Best-for / Avoid-if
- Best-for Leonardo: teams that need many variations, quick A/B tests, inpainting (logo/CTA placement), template-based pipelines, and lower per-image cost. Good for small in-house marketing teams or agencies producing hundreds of creatives.
- Avoid Leonardo if: you need highly stylized, artistic hero imagery where nuance and “wow” look matter over repeatability.
- Best-for Midjourney: brands that want standout, premium-looking hero images for high-visibility campaigns and have designers to refine prompts and do post-processing.
- Avoid Midjourney if: you must deliver hundreds of near-identical ad variations fast and cheaply.

Practical checklist to get started (repeatable workflow)
1. Define constraints: aspect ratios (1:1, 4:5, 9:16), safe zones for text, and brand color/typography specs.
2. Create a brand kit: 2–3 reference images, color hex codes, logo file for inpainting.
3. Build 3 prompt templates: (hero, product-on-white, lifestyle) — include placement notes like “30% negative space top-right for headline.”
4. Generate 8–12 concepts per template (batch run).
5. Use inpainting to add logo or adjust background and upscaler for final export.
6. Export in required sizes, add ad copy/CTA in your design tool.
7. Run small A/B tests and track CTR/CPA; iterate on highest-performing prompts.
8. Maintain a prompt & variant library (what worked / which seed) for scale.

When the right answer depends
If you have a small team and low budget, Leonardo’s cheaper per-image speed wins. If you have a design-heavy workflow and want distinctive hero shots for brand-building, Midjourney can give higher “visual premium” at the cost of time and iteration.

If you want, I can: 1) draft three prompt templates for your product and ad formats, or 2) sketch a 30-day production plan for 100 creatives. (I recommend starting with a 2-week pilot: 50 creatives across 2 formats to test creative-to-conversion.)

Compare Midjourney and Leonardo AI