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.
- Altoz XC 610 SSi — commercial: daily paid use and high acreage; 61-inch deck; gas powered
- Scag RC Extreme Slope Mower — commercial: daily paid use and high acreage; 52-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- XC 610 SSi has a published top speed of 19 mph; RC Extreme Slope Mower has a published top speed of 3 mph, a 16 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- XC 610 SSi cuts from 1.5 in (38 mm) to 5 in (127 mm); RC Extreme Slope Mower cuts from 3.5 in (89 mm) to 11.5 in (292 mm). The cut-height range is the shortest and tallest cut the deck offers. Most lawns are kept well inside it.
- XC 610 SSi weighs 1,400 lbs (635 kg); RC Extreme Slope Mower weighs 2,400 lbs (1,088.6 kg), a 1,000 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What XC 610 SSi's weight means for a trailer ›
- XC 610 SSi has a 61 in (1,549 mm) deck; RC Extreme Slope Mower has a 52 in (1,321 mm) deck, a 9 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 ›
- XC 610 SSi has a 35 hp engine; RC Extreme Slope Mower has a 37 hp engine, a 2 hp difference. Published horsepower is the maker's rating at a stated engine speed. It is a different measure from displacement, and two engines of equal rating can pull differently.
calculated figures and what isn’t comparable
Calculated by MowerFacts
- XC 610 SSi works out to 9.4 acres/hour; RC Extreme Slope Mower works out to 1.3 acres/hour, a 8.1 acres/hour difference. Calculated by MowerFacts from deck width and the published top speed at 80% efficiency; it is not a manufacturer figure, and real mowing is slower.
Not comparable
- Fuel Capacity: not published for RC Extreme Slope Mower.
- Warranty: not published for RC Extreme Slope Mower.
- Blades: not published for RC Extreme Slope Mower.
- Transmission: not published for RC Extreme Slope Mower.
- Fuel Type: not published for RC Extreme Slope Mower.
- Deck Material: not published for RC Extreme Slope Mower.
- Drive System: not published for XC 610 SSi.
- Price: XC 610 SSi is dealer quote only.
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 | XC 610 SSi Altoz · Commercial |
RC Extreme Slope Mower Scag · Commercial |
|---|---|---|
| List price | dealer quote | $57,900–$59,750 |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki | Vanguard BIG BLOCK™ V-Twin EFI engine with ETC with Oil Guard |
| Displacement | 61 ci (999 cc) | 60.6 ci (993 cc) |
| Engine Power | 35 hp | 37 hp |
| Cylinders | 2 | — |
| Engine Model | FX1000V EFI | — |
| Fuel Type | Gasoline | — |
| Deck | ||
| Cutting Width | 61 in (1549 mm) | 52 in (1321 mm) |
| Blades | 3 | — |
| Deck Material | Fabricated Steel | — |
| Anti-Scalp Rollers | No | — |
| Min Cut Height | 1.5 in (38 mm) | 3.5 in (89 mm) |
| Blade Tip Speed | 18501 ft/min (5639 m/min) | — |
| Max Cut Height | 5 in (127 mm) | 11.5 in (292 mm) |
| Drive | ||
| Transmission | Hydrostatic | — |
| Ground Speed | 19 mph | 3 mph |
| Drive Tire Size | 26" | — |
| Drive System | — | Electric Drive (No PTO) |
| Dimensions | ||
| Weight | 1400 lbs (635 kg) | 2400 lbs (1088.6 kg) |
| Fuel Capacity | 14 gal (53 L) | — |
| Length | 85.5 in (2172 mm) | 75.4 in (1915 mm) |
| Width | — | 70 in (1778 mm) |
| General | ||
| Warranty | 3 yr | — |
Where these models differ, explained
XC 610 SSi: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — altoz.com.
RC Extreme Slope Mower: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — scag.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.