Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | OM System - OM-1 Mark II | Sony - α6700 |
|---|---|---|
| Weight | 599 g | 493 g |
| AF points | 1053 | 759 |
| Megapixels | 20 MP | 26 MP |
| Sensor size | Four Thirds | APS-C |
| Max video | 4K60 | 4K120 |
Between the OM-1 Mark II and α6700, the OM-1 Mark II comes out ahead in af points, while the α6700 wins on weight / megapixels. Overall, the OM-1 Mark II scores 67.4 and the α6700 scores 71.4 on our Mars Score.
Which should you buy?
The α6700 edges ahead on the Mars Score (67.4 vs 71.4), but the 4.0-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the OM-1 Mark II if you care most about af points. The biggest gaps in its favor are af points. The single most decisive one: AF points — 38.74% more. 1053 vs 759.
Pick the α6700 if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight, megapixels, sensor size, among others. The single most decisive one: Weight — 106.00 g less. 493 vs 599.
Both ship with comparable 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: OM System - OM-1 Mark II or Sony - α6700?
Sony - α6700 leads the current Mars Score by 4.0 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 OM System - OM-1 Mark II if…
OM System - OM-1 Mark II has the measurable edge on af points.
Choose Sony - α6700 if…
Sony - α6700 has the measurable edge on weight g, megapixels, sensor size.
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 OM System - OM-1 Mark II wins
- ▲AF points — 38.74% more. 1053 vs 759.
Why Sony - α6700 wins
- ▲Weight — 106.00 g less. 493 vs 599.
- ▲Megapixels — 30.00% more. 26 MP vs 20 MP.
- ▲Sensor size: APS-C (vs Four Thirds).
- ▲Max video: 4K120 (vs 4K60).
Spec comparison
Sensor
| Spec | OM System - OM-1 Mark II | Sony - α6700 |
|---|---|---|
| Sensor sizeⓘ | Four Thirds | APS-Clead |
| Megapixels | 20 MP | 26 MPlead |
| Max ISO | 102400lead | 32000 |
Video
| Spec | OM System - OM-1 Mark II | Sony - α6700 |
|---|---|---|
| Max video | 4K60 | 4K120lead |
| RAW video | false | false |
| Log profileⓘ | true | true |
Autofocus
| Spec | OM System - OM-1 Mark II | Sony - α6700 |
|---|---|---|
| AF pointsⓘ | 1053lead | 759 |
| Eye AFⓘ | true | true |
| In-body stabilizationⓘ | true | true |
Body & Controls
| Spec | OM System - OM-1 Mark II | Sony - α6700 |
|---|---|---|
| Weight | 599 g | 493 glead |
| Weather sealedⓘ | true | true |
| Dual card slotsⓘ | truelead | false |