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.
- Exmark Vertex S-Series (52 in EFI) — commercial: daily paid use and high acreage; 52-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.
- Vertex S-Series (52 in EFI) lists at $13,999; RC Extreme Slope Mower lists at $57,900 to $59,750, a $43,901 difference. List price is the maker's own figure before tax, freight and dealer setup. Dealers set the final price.
- Vertex S-Series (52 in EFI) 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.
- Vertex S-Series (52 in EFI) has a published top speed of 8.5 mph; RC Extreme Slope Mower has a published top speed of 3 mph, a 5.5 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- Vertex S-Series (52 in EFI) weighs 987 lbs (447.7 kg); RC Extreme Slope Mower weighs 2,400 lbs (1,088.6 kg), a 1,413 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Vertex S-Series (52 in EFI)'s weight means for a trailer ›
- Vertex S-Series (52 in EFI) has a 25 hp engine; RC Extreme Slope Mower has a 37 hp engine, a 12 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.
1 more difference, calculated figures and what isn’t comparable
Other verified differences
- Vertex S-Series (52 in EFI) has a 45.6 ci (747 cc) engine; RC Extreme Slope Mower has a 60.6 ci (993 cc) engine, a 15 ci difference.
Calculated by MowerFacts
- Vertex S-Series (52 in EFI) works out to 3.6 acres/hour; RC Extreme Slope Mower works out to 1.3 acres/hour, a 2.3 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.
- Drive System: not published for Vertex S-Series (52 in EFI).
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 | Vertex S-Series (52 in EFI) Exmark · Commercial |
RC Extreme Slope Mower Scag · Commercial |
|---|---|---|
| List price | $13,999 | $57,900–$59,750 |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kohler ECV740 | Vanguard BIG BLOCK™ V-Twin EFI engine with ETC with Oil Guard |
| Displacement | 45.6 ci (747 cc) | 60.6 ci (993 cc) |
| Engine Power | 25 hp | 37 hp |
| Deck | ||
| Cutting Width | 52 in (1321 mm) | 52 in (1321 mm) |
| Min Cut Height | 1.5 in (38 mm) | 3.5 in (89 mm) |
| Max Cut Height | 5 in (127 mm) | 11.5 in (292 mm) |
| Drive | ||
| Ground Speed | 8.5 mph | 3 mph |
| Drive System | — | Electric Drive (No PTO) |
| Dimensions | ||
| Weight | 987 lbs (447.7 kg) | 2400 lbs (1088.6 kg) |
| Fuel Capacity | 8 gal (30.3 L) | — |
| Length | — | 75.4 in (1915 mm) |
| Width | — | 70 in (1778 mm) |
Vertex S-Series (52 in EFI): Specs verified against the retailer listing on Jun 6, 2026 — howardbrothers.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.