Comparison
TK700STi vs ZK431ST-B
A side-by-side look at how the BenQ TK700STi and Optoma ZK431ST-B compare on specs, accuracy, room requirements, and price. No hype — just the parts of the decision a buyer actually weighs.
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Specifications
The numbers, lined up.
Image
| Spec | TK700STi | ZK431ST-B |
|---|---|---|
| Resolution | True 4K (3840×2160) | 4K UHD (3840×2160) native |
| Lumens | 3,000 | 4,100 ANSI |
| HDR | HDR10 | — |
| Picture Mode | — | Golf Sim colour mode, factory-calibrated |
| Screen Size | — | 30–300 in |
- ResolutionTK700STiTrue 4K (3840×2160)ZK431ST-B4K UHD (3840×2160) native
- LumensTK700STi3,000ZK431ST-B4,100 ANSI
- HDRTK700STiHDR10ZK431ST-B—
- Picture ModeTK700STi—ZK431ST-BGolf Sim colour mode, factory-calibrated
- Screen SizeTK700STi—ZK431ST-B30–300 in
Hardware
| Spec | TK700STi | ZK431ST-B |
|---|---|---|
| Light Source | Lamp (4,000–15,000 hours) | DuraCore laser (30,000 hours, eco) |
| Throw Ratio | 0.9–1.08 (short-throw) | 0.496:1 (ultra-short throw) |
| Lens | — | Golf Sim short-throw lens included |
| Keystone | — | ±15° with Smart Fit auto-alignment |
- Light SourceTK700STiLamp (4,000–15,000 hours)ZK431ST-BDuraCore laser (30,000 hours, eco)
- Throw RatioTK700STi0.9–1.08 (short-throw)ZK431ST-B0.496:1 (ultra-short throw)
- LensTK700STi—ZK431ST-BGolf Sim short-throw lens included
- KeystoneTK700STi—ZK431ST-B±15° with Smart Fit auto-alignment
Performance
| Spec | TK700STi | ZK431ST-B |
|---|---|---|
| Input Lag | 16ms at 4K (lower at 1080p/240Hz) | 16.7 ms at 4K/60Hz; 8.6 ms at 1080p/120Hz |
- Input LagTK700STi16ms at 4K (lower at 1080p/240Hz)ZK431ST-B16.7 ms at 4K/60Hz; 8.6 ms at 1080p/120Hz
Who each one is better for
Honest persona fit, side by side.
Better for TK700STi
- Recreational Player
True 4K with HDR makes virtual courses look genuinely good, and the lamp economy keeps total spend reasonable.
- Cost-Effective Buyer
The cheapest path into 4K sim. Lamp life is the tradeoff; if you want laser longevity, step up to the TK710STi for ~$700 more.
Better for ZK431ST-B
- Performance Seeker
Native 4K with published low lag and a factory golf colour profile, so the image is right without a calibration session. 4,100 lumens holds up in a room that is not fully blacked out.
- Space-Constrained
0.496:1 puts a 100-inch image up from under three feet, so it mounts close and stays out of the swing path. The tightest throw in the catalog alongside the GT2400HDR, but in 4K.
Both fit
- Family Setup
Also worth a look
More comparisons with the TK700STi and ZK431ST-B.
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