Compare Mowers
List prices are the manufacturer’s published figures, re-checked daily; they exclude tax, freight and dealer setup.
A side-by-side reference of each model's stated specifications. MowerFacts doesn’t give opinions: where a published, spec-derived rule can separate machines we mark a Data Pick and show the rule; here, read the values and decide what fits your needs.
Best suited for
What each model is built for, from its duty class and key specs. This is a neutral reference — MowerFacts does not rank one model above another.
- Sunseeker Sunseeker X9 Plus — residential: typical home lawns; 17-inch deck; battery (no fuel or engine maintenance)
- Sunseeker Sunseeker X4 — residential: typical home lawns; 8-inch deck; battery (no fuel or engine maintenance)
What’s different? The 5 differences that matter most, from the published figures.
- Sunseeker X9 Plus is rated for 6.00 acres (24,281 m²) of lawn; Sunseeker X4 is rated for 0.30 acres (1,214 m²) of lawn, a 5.70 acres difference. The rated lawn area is the maker's figure under its own test conditions. Obstacles, slopes and complex shapes reduce it.
- Sunseeker X9 Plus has a 17 in (432 mm) deck; Sunseeker X4 has a 7.9 in (201 mm) deck, a 9.1 in difference. Deck width sets how much grass each pass covers. Mowing time also depends on ground speed, turns and obstacles, so a wider deck alone does not fix the job's length. Time both decks on your own lawn ›
- Sunseeker X9 Plus weighs 72 lbs (32.7 kg); Sunseeker X4 weighs 27 lbs (12.2 kg), a 45 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Sunseeker X9 Plus's weight means for a trailer ›
- Sunseeker X9 Plus is rated for slopes to 90%; Sunseeker X4 is rated for slopes to 45%, a 45 points difference. The slope rating is the maker's limit for safe operation, not a measure of performance.
- Sunseeker X9 Plus cuts from 0.8 in (20 mm) to 4 in (102 mm); Sunseeker X4 cuts from 1.6 in (41 mm) to 3.2 in (81 mm). The cut-height range is the shortest and tallest cut the deck offers. Most lawns are kept well inside it.
2 more differences, what isn’t comparable
Other verified differences
- Sunseeker X9 Plus ships with a 8 Ah battery; Sunseeker X4 ships with a 5 Ah battery, a 3 Ah difference.
- Sunseeker X9 Plus is rated at 70 dB; Sunseeker X4 is rated at 60 dB, a 10 dB difference.
Not comparable
- Voltage: not published for Sunseeker X4.
Verified means each manufacturer publishes the figure. A bigger number is only a bigger number; nothing here says which machine is better. The full specification table is below.
Which is faster on your property? › Measure your lawn once and MowerFacts times all 2 against it.
| Spec | Sunseeker X9 Plus Sunseeker · Robotic |
Sunseeker X4 Sunseeker · Robotic |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | battery | battery |
| Electrical | ||
| Voltage | 42 V | — |
| Battery Capacity | 8 Ah | 5 Ah |
| Deck | ||
| Cutting Width | 17 in (432 mm) | 7.9 in (201 mm) |
| Min Cut Height | 0.8 in (20 mm) | 1.6 in (41 mm) |
| Max Cut Height | 4 in (102 mm) | 3.2 in (81 mm) |
| Blades | 6 | 6 |
| Drive | ||
| Drive Type | AWD/4WD | Rear-Wheel Drive |
| Dimensions | ||
| Weight | 72 lbs (32.7 kg) | 27 lbs (12.2 kg) |
| Robotic | ||
| Work Area | 24281 ft2 | 1214 ft2 |
| Max Slope | 90 pct | 45 pct |
| Navigation | AONavi™ 2.0 (nRTK + VSLAM 2.0) / 360° OmniSight™ | 360° 3D LiDAR + Vision AI (L - SLAM) |
| Noise Level | 70 db | 60 db |
| Rain Sensor | Yes | Yes |
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.