Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | BenQ - TK860i | BenQ - X3100i |
|---|---|---|
| Light source | Lamp | LED |
Between the TK860i and X3100i, the TK860i comes out ahead in several specs, while the X3100i wins on light source. Overall, the TK860i scores 76.6 and the X3100i scores 76.6 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes; the decision sits on which individual spec advantages weigh more for your use.
The TK860i 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 X3100i if you care most about light source. Its strongest claims are light source. The single most decisive one: Light source: LED (vs Lamp).
Both ship with comparable brightness, resolution, short-throw, 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 - TK860i or BenQ - X3100i?
The two products are effectively tied on the current Mars Score.The more useful decision is the trade-off behind that result: compare light source against the way you will actually use the product.
Choose BenQ - TK860i if…
BenQ - TK860i does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose BenQ - X3100i if…
BenQ - X3100i has the measurable edge on light source.
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 - TK860i wins
- No decisive advantages.
Why BenQ - X3100i wins
- ▲Light source: LED (vs Lamp).
Spec comparison
Image
| Spec | BenQ - TK860i | BenQ - X3100i |
|---|---|---|
| Resolutionⓘ | 4K | 4K |
| Brightnessⓘ | 3300 lm | 3300 lm |
| Contrast | 600000:1 | 600000:1 |
| Light source | Lamp | LEDlead |
| Short-throw | false | false |
Smart & Connectivity
| Spec | BenQ - TK860i | BenQ - X3100i |
|---|---|---|
| Smart OS | Android TV | Android TV |
| HDMI inputs | 2 | 2 |
| Built-in speakers | true | true |