Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | BenQ - X3100i | Epson - EpiqVision Ultra LS800 |
|---|---|---|
| Brightness | 3300 lm | 4000 lm |
| Light source | LED | Laser |
| Short-throw | false | true |
Between the X3100i and EpiqVision Ultra LS800, the X3100i comes out ahead in several specs, while the EpiqVision Ultra LS800 wins on brightness / light source. Overall, the X3100i scores 76.6 and the EpiqVision Ultra LS800 scores 82 on our Mars Score.
Which should you buy?
The EpiqVision Ultra LS800 edges ahead on the Mars Score (76.6 vs 82), but the 5.4-point gap is small enough that the right pick comes down to which spec advantages matter to you.
The X3100i 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 EpiqVision Ultra LS800 if you care most about brightness / light source. Its strongest claims are brightness, light source, short-throw. The single most decisive one: Brightness — 21.21% more. 4000 lm vs 3300 lm.
Both ship with comparable resolution, so those specs do not separate the two — focus on the differences below.
Bottom line: the EpiqVision Ultra LS800 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: BenQ - X3100i or Epson - EpiqVision Ultra LS800?
Epson - EpiqVision Ultra LS800 leads the current Mars Score by 5.4 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 BenQ - X3100i if…
BenQ - X3100i does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose Epson - EpiqVision Ultra LS800 if…
Epson - EpiqVision Ultra LS800 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 BenQ - X3100i wins
- No decisive advantages.
Why Epson - EpiqVision Ultra LS800 wins
- ▲Brightness — 21.21% more. 4000 lm vs 3300 lm.
- ▲Light source: Laser (vs LED).
- ▲Short-throw: true (vs false).
Spec comparison
Image
| Spec | BenQ - X3100i | Epson - EpiqVision Ultra LS800 |
|---|---|---|
| Resolutionⓘ | 4K | 4K |
| Brightnessⓘ | 3300 lm | 4000 lmlead |
| Contrast | 600000:1 | 2500000:1 |
| Light source | LED | Laserlead |
| Short-throw | false | truelead |
Smart & Connectivity
| Spec | BenQ - X3100i | Epson - EpiqVision Ultra LS800 |
|---|---|---|
| Smart OS | Android TV | Android TV |
| HDMI inputs | 2 | 3lead |
| Built-in speakers | true | true |