Between the UHZ65UST and X2-4K, the UHZ65UST comes out ahead in brightness, while the X2-4K wins on several specs. Overall, the UHZ65UST scores 87.6 and the X2-4K scores 78.6 on our Mars Score.
Which should you buy?
The UHZ65UST is the clear pick on raw spec strength, leading by 9.0 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 UHZ65UST if you care most about brightness. The biggest gaps in its favor are brightness.
The X2-4K similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable resolution, light source, short-throw, so those specs don't separate the two — focus on the differences below.
Bottom line: the UHZ65UST is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Optoma - UHZ65UST wins
- ▲Brightness — 20.69% more. 3500 lm vs 2900 lm.
Why ViewSonic - X2-4K wins
- No decisive advantages.
Spec comparison
Image
| Spec | Optoma - UHZ65UST | ViewSonic - X2-4K |
|---|---|---|
| Resolutionⓘ | 4K | 4K |
| Brightness | 3500 lmlead | 2900 lm |
| Contrast | 2500000:1 | 3000000:1 |
| Light source | Laser | Laser |
| Short-throw | true | true |
Smart & Connectivity
| Spec | Optoma - UHZ65UST | ViewSonic - X2-4K |
|---|---|---|
| Smart OS | None | Google TV |
| HDMI inputs | 3lead | 2 |
| Built-in speakers | true | true |
Frequently asked
Spec-level deep dives
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