Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Epson - Home Cinema 3800 | Optoma - UHZ65UST |
|---|---|---|
| Brightness | 3000 lm | 3500 lm |
| Light source | Lamp | Laser |
| Short-throw | false | true |
Between the Home Cinema 3800 and UHZ65UST, the Home Cinema 3800 comes out ahead in several specs, while the UHZ65UST wins on brightness / light source. Overall, the Home Cinema 3800 scores 74.3 and the UHZ65UST scores 78.2 on our Mars Score.
Which should you buy?
The UHZ65UST edges ahead on the Mars Score (74.3 vs 78.2), but the 3.9-point gap is small enough that the right pick comes down to which spec advantages matter to you.
The Home Cinema 3800 does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the UHZ65UST if you care most about brightness / light source. Its strongest claims are brightness, light source, short-throw. The single most decisive one: Brightness — 16.67% more. 3500 lm vs 3000 lm.
Both ship with comparable resolution, 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: Epson - Home Cinema 3800 or Optoma - UHZ65UST?
Optoma - UHZ65UST leads the current Mars Score by 3.9 points.The more useful decision is the trade-off behind that result: compare brightness, light source, short-throw against the way you will actually use the product.
Choose Epson - Home Cinema 3800 if…
Epson - Home Cinema 3800 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose Optoma - UHZ65UST if…
Optoma - UHZ65UST has the measurable edge on brightness lumens, light source, is short throw.
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 Epson - Home Cinema 3800 wins
- No decisive advantages.
Why Optoma - UHZ65UST wins
- ▲Brightness — 16.67% more. 3500 lm vs 3000 lm.
- ▲Light source: Laser (vs Lamp).
- ▲Short-throw: true (vs false).
Spec comparison
Image
| Spec | Epson - Home Cinema 3800 | Optoma - UHZ65UST |
|---|---|---|
| Resolutionⓘ | 4K | 4K |
| Brightnessⓘ | 3000 lm | 3500 lmlead |
| Contrast | 100000:1 | 2500000:1 |
| Light source | Lamp | Laserlead |
| Short-throw | false | truelead |
Smart & Connectivity
| Spec | Epson - Home Cinema 3800 | Optoma - UHZ65UST |
|---|---|---|
| Smart OS | None | None |
| HDMI inputs | 2 | 3lead |
| Built-in speakers | true | true |