Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Epson - EpiqVision Ultra LS650 | ViewSonic - X2-4K |
|---|---|---|
| Brightness | 3600 lm | 2900 lm |
Between the EpiqVision Ultra LS650 and X2-4K, the EpiqVision Ultra LS650 comes out ahead in brightness, while the X2-4K wins on several specs. Overall, the EpiqVision Ultra LS650 scores 78.9 and the X2-4K scores 73.5 on our Mars Score.
Which should you buy?
The EpiqVision Ultra LS650 edges ahead on the Mars Score (78.9 vs 73.5), but the 5.4-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the EpiqVision Ultra LS650 if you care most about brightness. The biggest gaps in its favor are brightness. The single most decisive one: Brightness — 24.14% more. 3600 lm vs 2900 lm.
The X2-4K similarly does not 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 do not separate the two — focus on the differences below.
Bottom line: the EpiqVision Ultra LS650 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: Epson - EpiqVision Ultra LS650 or ViewSonic - X2-4K?
Epson - EpiqVision Ultra LS650 leads the current Mars Score by 5.4 points.The more useful decision is the trade-off behind that result: compare brightness against the way you will actually use the product.
Choose Epson - EpiqVision Ultra LS650 if…
Epson - EpiqVision Ultra LS650 has the measurable edge on brightness lumens.
Choose ViewSonic - X2-4K if…
ViewSonic - X2-4K does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
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 - EpiqVision Ultra LS650 wins
- ▲Brightness — 24.14% more. 3600 lm vs 2900 lm.
Why ViewSonic - X2-4K wins
- No decisive advantages.
Spec comparison
Image
| Spec | Epson - EpiqVision Ultra LS650 | ViewSonic - X2-4K |
|---|---|---|
| Resolutionⓘ | 4K | 4K |
| Brightnessⓘ | 3600 lmlead | 2900 lm |
| Contrast | 2500000:1 | 3000000:1 |
| Light source | Laser | Laser |
| Short-throw | true | true |
Smart & Connectivity
| Spec | Epson - EpiqVision Ultra LS650 | ViewSonic - X2-4K |
|---|---|---|
| Smart OS | Android TV | Google TV |
| HDMI inputs | 3lead | 2 |
| Built-in speakers | true | true |