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Key differences: 40V HP Brushless 21 in Self-Propelled Mower has more weight, a wider cutting deck and a longer warranty. 18V ONE+ 13 in Push Mower Kit has less weight, a narrower cutting deck and a shorter warranty.
Objective comparison of stated specs — not a recommendation.
How to read the labels
- larger / more / wider / faster — this mower has the higher value for that spec.
- smaller / less / lighter / slower — this mower has the lower value.
- Labels are directional only; whether more is desirable depends on your needs.
- Note: a lower deck-gauge number means thicker steel, so for Deck Gauge a smaller number is the more durable deck.
| Spec | 40V HP Brushless 21 in Self-Propelled Mower Ryobi · Push / Walk-Behind |
18V ONE+ 13 in Push Mower Kit Ryobi · Push / Walk-Behind |
|---|---|---|
| Engine | ||
| Power Source | battery | battery |
| Fuel Type | Battery / Electric | Battery / Electric |
| Electrical | ||
| Voltage | — | 18 V |
| Deck | ||
| Cutting Width | 21 in (533 mm) wider | 13 in (330 mm) narrower |
| Min Cut Height | 1 in (25 mm) | 1.5 in (38 mm) |
| Max Cut Height | 4 in (102 mm) | 4 in (102 mm) |
| Discharge | Mulching, Bagging, Side Discharge | Mulching & Bagging |
| Drive | ||
| Drive Type | Self-Propelled | Push |
| Dimensions | ||
| Weight | 67 lbs (30.3 kg) heavier | 29 lbs (12.9 kg) lighter |
| General | ||
| Warranty | 5 yr longer warranty | 3 yr shorter warranty |
| Bagger Capacity | 2 bu (70.5 L) | — |
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.