Between the Nebula Mars 3 and X2-4K, the Nebula Mars 3 comes out ahead in several specs, while the X2-4K wins on brightness and resolution. Overall, the Nebula Mars 3 scores 46.5 and the X2-4K scores 78.6 on our Mars Score.
Which should you buy?
The X2-4K is the clear pick on raw spec strength, leading by 32.1 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.
The Nebula Mars 3 doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the X2-4K if you care most about brightness and resolution. Its strongest claims are brightness, resolution, short-throw.
Both ship with comparable light source, so those specs don't separate the two — focus on the differences below.
Bottom line: the X2-4K is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Anker - Nebula Mars 3 wins
- No decisive advantages.
Why ViewSonic - X2-4K wins
- ▲Brightness — 190.00% more. 2900 lm vs 1000 lm.
- ▲Resolution: 4K (vs 1080p).
- ▲Short-throw: true (vs false).
Spec comparison
Image
| Spec | Anker - Nebula Mars 3 | ViewSonic - X2-4K |
|---|---|---|
| Resolutionⓘ | 1080p | 4Klead |
| Brightness | 1000 lm | 2900 lmlead |
| Contrast | 1500:1 | 3000000:1 |
| Light source | Laser | Laser |
| Short-throw | false | truelead |
Smart & Connectivity
| Spec | Anker - Nebula Mars 3 | ViewSonic - X2-4K |
|---|---|---|
| Smart OS | Android TV | Google TV |
| HDMI inputs | 1 | 2lead |
| Built-in speakers | true | true |
Frequently asked
Spec-level deep dives
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