Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Fujifilm - GFX 100 II | OM System - OM-1 Mark II |
|---|---|---|
| Weight | 1030 g | 599 g |
| Megapixels | 102 MP | 20 MP |
| AF points | 425 | 1053 |
| Sensor size | Medium Format | Four Thirds |
| Max video | 8K | 4K60 |
Between the GFX 100 II and OM-1 Mark II, the GFX 100 II comes out ahead in megapixels / sensor size, while the OM-1 Mark II wins on weight / af points. Overall, the GFX 100 II scores 81.7 and the OM-1 Mark II scores 67.4 on our Mars Score.
Which should you buy?
The GFX 100 II is the clear pick on raw spec strength, leading by 14.3 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the GFX 100 II if you care most about megapixels / sensor size. The biggest gaps in its favor are megapixels, sensor size, max video. The single most decisive one: Megapixels — 410.00% more. 102 MP vs 20 MP.
Pick the OM-1 Mark II if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight, af points. The single most decisive one: Weight — 431.00 g less. 599 vs 1030.
Both ship with comparable in-body stabilization, log profile, so those specs do not separate the two — focus on the differences below.
Bottom line: the GFX 100 II is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Fujifilm - GFX 100 II or OM System - OM-1 Mark II?
Fujifilm - GFX 100 II leads the current Mars Score by 14.3 points.The more useful decision is the trade-off behind that result: compare megapixels, sensor size, max video, weight against the way you will actually use the product.
Choose Fujifilm - GFX 100 II if…
Fujifilm - GFX 100 II has the measurable edge on megapixels, sensor size, max video.
Choose OM System - OM-1 Mark II if…
OM System - OM-1 Mark II has the measurable edge on weight g, af points.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Fujifilm - GFX 100 II wins
- ▲Megapixels — 410.00% more. 102 MP vs 20 MP.
- ▲Sensor size: Medium Format (vs Four Thirds).
- ▲Max video: 8K (vs 4K60).
Why OM System - OM-1 Mark II wins
- ▲Weight — 431.00 g less. 599 vs 1030.
- ▲AF points — 147.76% more. 1053 vs 425.
Spec comparison
Sensor
| Spec | Fujifilm - GFX 100 II | OM System - OM-1 Mark II |
|---|---|---|
| Sensor sizeⓘ | Medium Formatlead | Four Thirds |
| Megapixels | 102 MPlead | 20 MP |
| Max ISO | 12800 | 102400lead |
Video
| Spec | Fujifilm - GFX 100 II | OM System - OM-1 Mark II |
|---|---|---|
| Max video | 8Klead | 4K60 |
| RAW video | truelead | false |
| Log profileⓘ | true | true |
Autofocus
| Spec | Fujifilm - GFX 100 II | OM System - OM-1 Mark II |
|---|---|---|
| AF pointsⓘ | 425 | 1053lead |
| Eye AFⓘ | true | true |
| In-body stabilizationⓘ | true | true |
Body & Controls
| Spec | Fujifilm - GFX 100 II | OM System - OM-1 Mark II |
|---|---|---|
| Weight | 1030 g | 599 glead |
| Weather sealedⓘ | true | true |
| Dual card slotsⓘ | true | true |