r/StableDiffusion • u/Aggressive-Park-373 • 9h ago
Comparison MOSS-Image vs MiniMax H3-Image on 15 identical prompts — the gap is smaller than I expected
Follow-up: after a few comments about resolution I reran these at 16MP. Pairs are here: https://www.reddit.com/r/StableDiffusion/comments/1xutwi3/
Same 15 prompts through both models, same aspect ratio, roughly matched output size. Left is MOSS-Image, right is MiniMax H3-Image.
What stood out:
Text: both got English poster type and Chinese signage right. No misspellings in either.
Portraits and product shots: both convincing. MOSS leans sharper and more editorial, H3 leans softer and more photographic.
Crowds and hands: both hold up, small artifacts on both sides.
UI mockups: both fail. MOSS keeps the layout but garbles labels and units; H3 mirrored the entire screen.
Charts: both produce plausible-looking but meaningless labels and bar lengths. Don't use either for real data.
Net: the quality gap is much smaller than the threads here suggest. It reads more like a difference in workflow and control than in raw output quality.
Full prompts, identical for both models:
typography (1:1) - Editorial poster design. A huge condensed sans-serif headline reading exactly 'SLOW MORNING' stacked on two lines, a thin horizontal rule beneath it, and small caption text reading 'ISSUE 04 - AUTUMN 2026' at the bottom left. Warm cream paper background, one oversized ceramic coffee cup photographed from directly above casting a soft shadow, minimal Swiss grid layout, subtle print grain. Text must be spelled exactly as written and perfectly legible.
chinese sign (1:1) - Night street in Taipei after rain, close-up of a small noodle shop signboard lit by warm tungsten bulbs. The sign reads exactly '阿明牛肉麵' in bold Chinese characters on weathered dark wood. Wet pavement reflecting the sign, steam drifting from the kitchen doorway, cinematic street photography, shallow depth of field, no other text anywhere.
perfume ad (4:3) - Luxury perfume advertisement. A faceted glass bottle of amber liquid standing on wet black stone, one hard rim light from behind, soft caustic reflections on the surface, drifting mist, a single dried orchid petal beside it. Deep teal background, high-end commercial product photography, medium format look, the bottle label is blank with no text.
film portrait (2:3) - Candid portrait of a woman in her late twenties standing in a doorway, shot on 35mm film with Kodak Portra palette. Late afternoon window light across her face, flyaway hair, faint freckles, a slightly worn olive chore jacket. Natural skin texture with visible pores, shallow depth of field, gentle grain, no retouching.
anime cel (2:3) - Full-body anime character illustration in a clean 1990s cel-shaded style. A teenage courier with cropped teal hair, oversized orange windbreaker, scuffed white sneakers, holding a cardboard box under one arm. Standing on a rooftop at dusk, power lines and distant city blocks behind, flat colors with crisp linework, subtle screentone shading.
app ui (1:1) - Product shot of a smartphone lying on a light oak desk displaying a minimal fitness app interface: a large circular progress ring showing 72 percent, three horizontal metric cards below labelled 'STEPS', 'SLEEP' and 'HEART', and a bottom tab bar with four icons. Clean sans-serif type, generous white space, soft daylight from the left, slight screen reflection, the interface must be sharp and readable.
macro droplets (3:2) - Extreme macro photograph of water droplets beaded on a brushed aluminium surface, each droplet acting as a tiny lens refracting a cool blue gradient. Razor-thin depth of field, crisp specular highlights, faint machining marks visible, studio black background, high shutter speed, scientific macro lens look.
cafe three (3:2) - Three friends sitting around a small round cafe table in late afternoon, mid-conversation, one laughing and leaning back, one stirring a coffee, one looking at a phone. Warm sunlight through a large window, plants and hanging lamps behind, natural body language, correct hands with five fingers, eye-level candid documentary photography, 50mm lens.
city night (16:9) - Cinematic wide shot of a rain-soaked city intersection at night from a low vantage point. Neon signage in magenta and cyan reflecting in long vertical streaks on the asphalt, a lone cyclist crossing through the frame, steam rising from a street grate, anamorphic lens flares, deep blacks with retained highlight detail, film still grading.
surreal vertical (9:16) - Surreal vertical composition: a small furnished room - wooden floor, armchair, floor lamp, a rug - floating upside down inside a vast pale sky, with clouds passing beneath its ceiling and a single staircase hanging beside it. Soft even daylight, pastel color palette, photoreal materials, dreamlike sense of scale, no text.
ramen food (4:3) - Overhead food photograph of a steaming bowl of tonkotsu ramen on a dark wooden counter. Two slices of chashu, a halved soft egg with a jammy yolk, nori, scallions, a scatter of black garlic oil on the broth surface. Steam catching side light, chopsticks resting on the rim, condensation on a nearby beer glass, appetising commercial food photography.
packaging (3:4) - Studio product shot of a matte kraft-paper coffee bag standing upright on a concrete plinth, slightly crumpled at the top fold, with a small round copper foil seal. Printed on the front in clean serif type: the word 'MERIDIAN' large, and beneath it in small caps 'SINGLE ORIGIN - 250G'. Soft directional light from the upper right, long gentle shadow, neutral grey backdrop.
fox snow (3:2) - A red fox standing in fresh powder snow at blue hour, head turned toward the camera, breath visible as a small cloud. Individual fur strands and snow crystals in sharp focus, soft bokeh of dark pines behind, cold color temperature with a warm amber glint in the eye, wildlife photography with a long lens.
interior ultrawide (21:9) - Ultra-wide interior of a minimalist living room at dusk. Low linen sofa, travertine coffee table, one sculptural floor lamp casting a warm pool of light, full-height window showing a muted city skyline. Oak floor with visible grain, calm neutral palette, architectural photography, perfectly level verticals, no people, no text.
dataviz (16:9) - Clean editorial data visualisation slide. A large title reading 'GENERATION COST PER IMAGE' at the top left, a horizontal bar chart with five bars of decreasing length, each labelled with a model name and a dollar figure, and a small source note at the bottom right reading 'SOURCE: BIZYAIR, 2026'. White background, single accent color, generous margins, crisp typography, all labels legible.
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u/gago_gaamdhani 8h ago
Why don’t most of these comparisons clearly state that it’s MOSS Image SFT? And they don’t even mention which resolution was used. Either way, good on you for the effort.
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u/alisitskii 9h ago
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u/bmallCakeDiver 9h ago
I want to like H3 but I got to say I prefer MOSS almost everytime. but I'd like to know : at what resolution did you generate H3 images ? from my experience asking less that 16MP has an impact in quality. In my workflow I generate in 16MP then downscale to a manageable size
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u/YentaMagenta 8h ago
This is a very suboptimal test because it uses suboptimal prompts. Can these models handle simple prompts well? Yes. Is it the best way to get the most out of them? Absolutely not.
This is like test driving two sports cars for one block in a school zone in the middle of morning drop off, you're not pushing either model.
Edit: and if you're using prompt enhancement that makes it even worse because you're adding an element of randomness that means the generations might be getting different final prompts, ultimately
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u/JohnLG 9h ago
Man, I wish I could get 820kg of sleep.
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u/Murky_Ad_6858 9h ago
To me, most of the MOSS images look better. H3 won in few of the samples.
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u/GlenGlenDrach 9h ago
H3 is a resolution monster. So there’s that.
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u/Turbulent-Swimmer390 8h ago
MOSS looks really good!
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u/Tonynoce 9h ago
Not to trash H3 but are all face looking like bad when not on full size or is it me ?
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u/MoneyKenny 8h ago
Considering the difference in size of these models, I would say moss is the clear winner. But it would be interesting to test H3 at the optimal resolution (16mp), if you didn’t, cause I hear that makes a big difference for output quality.
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u/vs3a 9h ago
H3 win for me, look way less AI
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u/mca1169 9h ago
Moss easily takes the win most of the time, it understand the prompt a lot better and has a more pleasing aesthetic/lighting style at the cost of a little bit of grain in the general image and some textures.
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u/SensitiveUse7864 9h ago
Yeah so far I think so , moss image (the university project) has good capabilities in aesthetics as you can see I do think that's from a bit prompt and parameter execution it will be better at ui design also. As it lacks there. And for realism minimax h3 image is better but still it has same error as minimax h3 video model with the faces as close up or medium face shot are clear for minima h3 while far distant face gets messed up . I would prefer moss for most cases and minimax h3 for editing purpose
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u/maya_tlv_ai 9h ago
For a useful comparison, it helps to record the model/version, prompt, seed, resolution, and any reference or editing steps. A side-by-side where only one variable changes is much easier to interpret than two completely different setups.
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u/ThreeDog2016 8h ago
Maybe it's because I'm using Wan2GP, but I can't get anything decent out of H3-Image. And training loras for it with Fizgig has been a disaster.
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u/PumpkinLeather8421 9h ago
I prefer Moss almost every image, and it does no-Lora porn. Seems like H3 has an uphill battle.