Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | BenQ - W5800 | ViewSonic - X2-4K |
|---|---|---|
| Brightness | 2600 lm | 2900 lm |
| Short-throw | false | true |
Between the W5800 and X2-4K, the W5800 comes out ahead in several specs, while the X2-4K wins on brightness / short-throw. Overall, the W5800 scores 71.1 and the X2-4K scores 73.5 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (71.1 vs 73.5). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
The W5800 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 X2-4K if you care most about brightness / short-throw. Its strongest claims are brightness, short-throw. The single most decisive one: Brightness — 11.54% more. 2900 lm vs 2600 lm.
Both ship with comparable resolution, light source, 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: BenQ - W5800 or ViewSonic - X2-4K?
ViewSonic - X2-4K leads the current Mars Score by 2.4 points.The more useful decision is the trade-off behind that result: compare brightness, short-throw against the way you will actually use the product.
Choose BenQ - W5800 if…
BenQ - W5800 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose ViewSonic - X2-4K if…
ViewSonic - X2-4K has the measurable edge on brightness lumens, 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 - W5800 wins
- No decisive advantages.
Why ViewSonic - X2-4K wins
- ▲Brightness — 11.54% more. 2900 lm vs 2600 lm.
- ▲Short-throw: true (vs false).
Spec comparison
Image
| Spec | BenQ - W5800 | ViewSonic - X2-4K |
|---|---|---|
| Resolutionⓘ | 4K | 4K |
| Brightnessⓘ | 2600 lm | 2900 lmlead |
| Contrast | 2000000:1 | 3000000:1 |
| Light source | Laser | Laser |
| Short-throw | false | truelead |
Smart & Connectivity
| Spec | BenQ - W5800 | ViewSonic - X2-4K |
|---|---|---|
| Smart OS | None | Google TV |
| HDMI inputs | 2 | 2 |
| Built-in speakers | false | truelead |