Short answer: Midjourney v5.2 typically gives finer micro-detail and more cinematic tonality; Leonardo AI is easier/cheaper to iterate, with stronger inpainting and upscaling for clean product edges.

Midjourney sample: “Matte-black luxury smartwatch on white acrylic pedestal, 3‑point studio lighting, specular highlights, visible microtexture, 50mm f/2.8 shallow DOF, photoreal, macro” --v 5.2 --ar 4:5 --q 2 --s 50 --uplight --no text

Leonardo tips: use the Photoreal model, inpaint for edges, enable upscaler and set a fixed seed for reproducibility.

Compare details: Compare Leonardo AI and Midjourney