Between the UHD35STx and UHZ65UST, the UHD35STx comes out ahead in brightness, while the UHZ65UST wins on light source. Overall, the UHD35STx scores 89.1 and the UHZ65UST scores 87.6 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (89.1 vs 87.6). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the UHD35STx if you care most about brightness. The biggest gaps in its favor are brightness.
Pick the UHZ65UST if you care most about light source. Its strongest claims are light source.
Both ship with comparable resolution, short-throw, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.
Why Optoma - UHD35STx wins
- ▲Brightness — 2.86% more. 3600 lm vs 3500 lm.
Why Optoma - UHZ65UST wins
- ▲Light source: Laser (vs Lamp).
Spec comparison
Image
| Spec | Optoma - UHD35STx | Optoma - UHZ65UST |
|---|---|---|
| Resolutionⓘ | 4K | 4K |
| Brightness | 3600 lmlead | 3500 lm |
| Contrast | 1000000:1 | 2500000:1 |
| Light source | Lamp | Laserlead |
| Short-throw | true | true |
Smart & Connectivity
| Spec | Optoma - UHD35STx | Optoma - UHZ65UST |
|---|---|---|
| Smart OS | None | None |
| HDMI inputs | 2 | 3lead |
| Built-in speakers | true | true |
Frequently asked
Spec-level deep dives
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