Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Fujifilm - GFX 100 II | Sony - α1 II |
|---|---|---|
| Weight | 1030 g | 743 g |
| Megapixels | 102 MP | 50 MP |
| AF points | 425 | 759 |
| Sensor size | Medium Format | Full Frame |
Between the GFX 100 II and α1 II, the GFX 100 II comes out ahead in megapixels / sensor size, while the α1 II wins on weight / af points. Overall, the GFX 100 II scores 81.7 and the α1 II scores 79.6 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (81.7 vs 79.6). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the GFX 100 II if you care most about megapixels / sensor size. The biggest gaps in its favor are megapixels, sensor size. The single most decisive one: Megapixels — 104.00% more. 102 MP vs 50 MP.
Pick the α1 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 — 287.00 g less. 743 vs 1030.
Both ship with comparable max video, in-body stabilization, log profile, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Fujifilm - GFX 100 II or Sony - α1 II?
Fujifilm - GFX 100 II leads the current Mars Score by 2.1 points.The more useful decision is the trade-off behind that result: compare megapixels, sensor size, 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.
Choose Sony - α1 II if…
Sony - α1 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 — 104.00% more. 102 MP vs 50 MP.
- ▲Sensor size: Medium Format (vs Full Frame).
Why Sony - α1 II wins
- ▲Weight — 287.00 g less. 743 vs 1030.
- ▲AF points — 78.59% more. 759 vs 425.
Spec comparison
Sensor
| Spec | Fujifilm - GFX 100 II | Sony - α1 II |
|---|---|---|
| Sensor sizeⓘ | Medium Formatlead | Full Frame |
| Megapixels | 102 MPlead | 50 MP |
| Max ISO | 12800 | 102400lead |
Video
| Spec | Fujifilm - GFX 100 II | Sony - α1 II |
|---|---|---|
| Max video | 8K | 8K |
| RAW video | true | true |
| Log profileⓘ | true | true |
Autofocus
| Spec | Fujifilm - GFX 100 II | Sony - α1 II |
|---|---|---|
| AF pointsⓘ | 425 | 759lead |
| Eye AFⓘ | true | true |
| In-body stabilizationⓘ | true | true |
Body & Controls
| Spec | Fujifilm - GFX 100 II | Sony - α1 II |
|---|---|---|
| Weight | 1030 g | 743 glead |
| Weather sealedⓘ | true | true |
| Dual card slotsⓘ | true | true |