Between the Nebula Cosmos Laser 4K and UHD35STx, the Nebula Cosmos Laser 4K comes out ahead in light source, while the UHD35STx wins on brightness and short-throw. Overall, the Nebula Cosmos Laser 4K scores 70.7 and the UHD35STx scores 89.1 on our Mars Score.
Which should you buy?
The UHD35STx is the clear pick on raw spec strength, leading by 18.4 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 Nebula Cosmos Laser 4K if you care most about light source. The biggest gaps in its favor are light source.
Pick the UHD35STx if you care most about brightness and short-throw. Its strongest claims are brightness, short-throw.
Both ship with comparable resolution, so those specs don't separate the two — focus on the differences below.
Bottom line: the UHD35STx is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Anker - Nebula Cosmos Laser 4K wins
- ▲Light source: Laser (vs Lamp).
Why Optoma - UHD35STx wins
- ▲Brightness — 50.00% more. 3600 lm vs 2400 lm.
- ▲Short-throw: true (vs false).
Spec comparison
Image
| Spec | Anker - Nebula Cosmos Laser 4K | Optoma - UHD35STx |
|---|---|---|
| Resolutionⓘ | 4K | 4K |
| Brightness | 2400 lm | 3600 lmlead |
| Contrast | 2200:1 | 1000000:1 |
| Light source | Laserlead | Lamp |
| Short-throw | false | truelead |
Smart & Connectivity
| Spec | Anker - Nebula Cosmos Laser 4K | Optoma - UHD35STx |
|---|---|---|
| Smart OS | Android TV | None |
| HDMI inputs | 1 | 2lead |
| Built-in speakers | true | true |
Frequently asked
Spec-level deep dives
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