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.
- Grasshopper 623T — commercial: daily paid use and high acreage; 48-inch deck; gas powered
- Kubota Z412KWNC-48 — commercial: daily paid use and high acreage; 48-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- 623T uses a Rehlko engine; Z412KWNC-48 uses a Kawasaki FS651V engine. The engine maker builds the engine; the mower maker chooses the model, rating and fit, so the badge alone does not settle output or longevity.
- 623T has a T-Drive Transmission transmission; Z412KWNC-48 has a Hydro-Gear Commercial ZT-3600 transmission. The transmission grade tracks duty rating and speed. Grade names are each maker's own and are not comparable across brands.
- 623T holds 4 gal (15.1 L) of fuel; Z412KWNC-48 holds 6.8 gal (25.7 L) of fuel, a 2.8 gal difference. Tank size bounds how long a machine runs between stops. Consumption varies with engine, load and speed, so hours per tank are not fixed.
- 623T has a published top speed of 8.5 mph; Z412KWNC-48 has a published top speed of 10 mph, a 1.5 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- 623T weighs 1,040 lbs (471.7 kg); Z412KWNC-48 weighs 904 lbs (410 kg), a 136 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What 623T's weight means for a trailer ›
1 more difference, calculated figures and what isn’t comparable
Other verified differences
- 623T has a 42.4 ci (694 cc) engine; Z412KWNC-48 has a 44.3 ci (726 cc) engine, a 2 ci difference.
Calculated by MowerFacts
- 623T works out to 3.3 acres/hour; Z412KWNC-48 works out to 3.9 acres/hour, a 0.6 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
- Engine Power: not published for 623T.
- Drive System: not published for 623T.
- Price: Z412KWNC-48 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 | 623T Grasshopper · Zero-Turn |
Z412KWNC-48 Kubota · Zero-Turn |
|---|---|---|
| List price | $15,870 | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Displacement | 42.4 ci (694 cc) | 44.3 ci (726 cc) |
| Engine Power | — | 22 hp |
| Engine Make | Rehlko | Kawasaki FS651V |
| Fuel Type | Gasoline | Gasoline |
| Cylinders | 2 | — |
| Deck | ||
| Cutting Width | 48 in (1219 mm) | 48 in (1219 mm) |
| Drive | ||
| Transmission | T-Drive Transmission | Hydro-Gear Commercial ZT-3600 |
| Ground Speed | 8.5 mph | 10 mph |
| Drive Tire Size | — | 24 x 9.5 - 14, LP |
| Drive System | — | Hydro-Gear Commercial ZT3600 2-HST w/Gear reduction |
| Reverse Speed | 5.5 mph | 5 mph |
| Dimensions | ||
| Weight | 1040 lbs (471.7 kg) | 904 lbs (410 kg) |
| Fuel Capacity | 4 gal (15.1 L) | 6.8 gal (25.7 L) |
| Length | 99 in (2515 mm) | 80.9 in (2055 mm) |
| Width | 47 in (1194 mm) | 61.1 in (1552 mm) |
| Height | — | 69.8 in (1772 mm) |
Where these models differ, explained
623T: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — grasshoppermower.com.
Z412KWNC-48: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — kubota.ca.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.