Main trade-off
BenQ W4100i
It retains the same minimum throw and has slightly higher published gaming latency.
Head-to-head
BenQ W4100i vs BenQ X3100i: W4100i shifts sideways, neither fixes a shallow room
The short answer
Choose the W4100i when sideways offset or several connected sources make installation harder. Choose the X3100i for a centered gaming setup where its lower published latency meets the need. Their identical throw range means neither fixes a room that is too shallow.
Before you choose
The reasoning and the trade-offs
The sideways shelf can outweigh a small latency gap
Horizontal shift can solve an alignment problem that vertical shift cannot. The W4100i’s published 4K/60 latency is only 1.2 ms higher. In a family room with a doorway beside the screen, optical alignment may be the more useful distinction.
What this is based on
BenQ W4100i: Horizontal shift up to 15 percent at its specified vertical position. 17.9 ms at 4K/60. BenQ X3100i: Vertical shift, 16.7 ms at 4K/60. Difference 1.2 ms.
Main trade-off
BenQ X3100i
No horizontal shift and fewer external HDMI sockets can complicate a shared room.
BenQ W4100i
- Choose it for
- A doorway or ceiling joist forces the lens sideways
- Horizontal optical shift avoids digital correction
- Main trade-off
- It retains the same minimum throw and has slightly higher published gaming latency.
BenQ X3100i
- Choose it for
- The lens can sit on the screen’s horizontal centerline
- High-refresh gaming is a main use
- Main trade-off
- No horizontal shift and fewer external HDMI sockets can complicate a shared room.
About this comparison
BenQ W4100i vs X3100i for movies and games. Compare off-center shelves, source connections and the small latency gap without losing sight of room fit.
Winner by situation
Start with what you need it to do
A shelf forced sideways by a doorway
Check the W4100i combined-axis limits. X3100i lacks horizontal optical shift.
- BenQ W4100i
- Better fit
- BenQ X3100i
- Caution
A centered competitive-gaming setup
X3100i has lower published format-specific latency.
- BenQ W4100i
- Good
- BenQ X3100i
- Better fit
Console, disc player and eARC soundbar kept connected
W4100i provides the extra external socket. Check the full signal path.
- BenQ W4100i
- Better fit
- BenQ X3100i
- Depends
A nine-foot shelf for a 120-inch screen
Both need about ten feet at minimum optical throw.
- BenQ W4100i
- Not suitable
- BenQ X3100i
- Not suitable
What matters in practice
The differences that matter
The sideways shelf can outweigh a small latency gap
Horizontal shift can solve an alignment problem that vertical shift cannot. The W4100i’s published 4K/60 latency is only 1.2 ms higher. In a family room with a doorway beside the screen, optical alignment may be the more useful distinction.
How we reached this conclusion
BenQ W4100i: Horizontal shift up to 15 percent at its specified vertical position. 17.9 ms at 4K/60. BenQ X3100i: Vertical shift, 16.7 ms at 4K/60. Difference 1.2 ms.
A soundbar consumes a source connection
With eARC in use, the W4100i retains two external HDMI sockets for a console and disc player. Its streamer has a separate internal connection. On the X3100i, check whether a receiver, switch or soundbar input is needed to keep both external sources connected.
How we reached this conclusion
BenQ W4100i: Three external HDMI inputs with eARC on HDMI 2 and internal QS02. BenQ X3100i: Two external HDMI inputs plus included streamer.
The cinema model cannot reach a shorter room
At 120 inches, both need about 10.0 to 13.1 feet from lens to screen. A nine-foot shelf remains outside both optical ranges. Horizontal shift changes alignment rather than minimum distance.
How we reached this conclusion
BenQ W4100i: 1.15 to 1.5 × 104.59 inches / 12 = 10.02 to 13.07 ft. BenQ X3100i: Same optical throw range.
Try your real numbers
Will either projector fit your room?
The result checks hard limits only. Preferences stay out of the calculation.
BenQ W4100i
Needs a manual checkNo complete verified optical range is stored for this exact model.
BenQ X3100i
Does not fit these inputsFor a 120-inch 16:9 picture, the calculated lens range is about 10.02 to 13.07 ft. Your input is 9.50 ft.
Distance is measured from the lens to the screen. The calculation uses a 16:9 image and the verified optical throw range for each exact model.
Choice A
BenQ, W4100i
W4100i
A home-cinema 4LED projector with optical lens shift, three external HDMI inputs and an included streaming dongle for a more settled room installation.
- Best matched use
- A doorway or ceiling joist forces the lens sideways
Checked facts
- Optical placement: 1.15 to 1.5 throw with horizontal and vertical shift
- External HDMI: Three external inputs plus internal QS02
- 4K/60 latency: 17.9 ms, published
- 1080p/240 latency: 6.5 ms, published
Choice B
BenQ, X3100i
X3100i
A color-rich 4LED gaming projector with low latency, broad resolution support, Android TV and a substantial vertical shift range.
- Best matched use
- The lens can sit on the screen’s horizontal centerline
Checked facts
- Optical placement: 1.15 to 1.5 throw with vertical shift
- External HDMI: Two external inputs plus included streamer
- 4K/60 latency: 16.7 ms, published
- 1080p/240 latency: 4.2 ms, published
Meaningful differences
What changes the fit
| What changes | BenQ W4100i | BenQ X3100i | Why it matters |
|---|---|---|---|
| Optical placement | 1.15 to 1.5 throw with horizontal and vertical shift | 1.15 to 1.5 throw with vertical shift | The W4100i adds sideways alignment, not a shorter throw. |
| External HDMI | Three external inputs plus internal QS02 | Two external inputs plus included streamer | Plan console, disc player and soundbar connections together. |
| 4K/60 latency | 17.9 ms, published | 16.7 ms, published | The 1.2 ms specification gap is a weak reason to accept a bad room layout. |
| 1080p/240 latency | 6.5 ms, published | 4.2 ms, published | These figures require the stated source format. They are not 4K/240. |
| Light engine | 4LED, 3,200 ANSI lumens | 4LED, 3,300 ANSI lumens | This small rated difference does not establish measured movie-mode output. |
What you give up
Every choice has a cost
If you choose BenQ W4100i
- HDMI 3 accepts 4K/120 input but displays it at 1080p/120. It is not a 4K/120 projector.
If you choose BenQ X3100i
- Independent testing found weaker dark-scene contrast and noted that 1440p input is internally downscaled.
Recommendation switch
The decision flips if...
A doorway or ceiling joist forces the lens sideways
Choose BenQ W4100i. Horizontal optical shift avoids digital correction
The lens can sit on the screen’s horizontal centerline
Choose BenQ X3100i. High-refresh gaming is a main use
What the facts say
What the comparison shows
Useful conclusions from the current home projectors comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| BenQ W4100i |
|
|
|
| BenQ X3100i |
|
|
Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
BenQ W4100i
A doorway or ceiling joist forces the lens sideways
See price & reviews on AmazonBenQ X3100i
The lens can sit on the screen’s horizontal centerline
See price & reviews on AmazonLinks open in a new tab.