Greenworks 40V 17" Cordless Lawn Mower – Brushless vs RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah
Updated July 2026 — Greenworks 40V 17" Cordless Lawn Mower – Brushless wins on price and noise level, RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah wins on weight.
The Greenworks mower offers superior performance and versatility for larger yards, while the RB mower is a budget-friendly option for small spaces.
Why Greenworks 40V 17" Cordless Lawn Mower – Brushless is better
Performance
Longer runtime and more powerful motor.
Cutting Heights
Offers 6 adjustable cutting heights.
Warranty
Includes a 3-year warranty for tool and battery.
Why RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah is better
Price
Cheaper by 39%.
Weight
Ultra-lightweight design for easy maneuverability.
Storage
Space-saving upright storage design.
Overall score
Specifications
| Spec | Greenworks 40V 17" Cordless Lawn Mower – Brushless | RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah |
|---|---|---|
| Motor Type | Brushless | Brushless |
| Yard Size | up to 1/4 acre | up to 540 sq.ft. |
| Maneuverability | Good | Excellent |
| Safety Features | Standard | Advanced |
| Warranty | 3 years | 1 year |
Dimension comparison
Price Comparison
When it comes to pricing, the Greenworks 40V 17" Cordless Lawn Mower is priced at $279.99, while the RB 9" Small Lawn Mower for Small Spaces costs $169.99. This makes the RB mower about 39% cheaper than the Greenworks model, which may be a significant factor for budget-conscious buyers. The price difference reflects the size and capabilities of the two mowers, with the Greenworks model aimed at small to medium yards and the RB model designed specifically for small spaces.
Performance and Power
In terms of performance, the Greenworks mower features a powerful 40V battery that provides up to 35 minutes of runtime with its 4.0Ah battery. This is beneficial for larger areas, as it can tackle medium-sized lawns up to 1/4 acre. The RB mower, while also powered by a 40V battery, comes with a smaller 2Ah battery, making it suitable for lawns up to 540 sq.ft. The RB mower has a brushless motor that operates at a high speed of 6000RPM, ensuring efficient cutting for its intended purpose. The Greenworks mower's brushless motor offers more power and torque but is designed for a different scale of operation.
Cutting Versatility
When comparing cutting versatility, the Greenworks mower offers 6 cutting heights, allowing for detailed customization to suit various grass types. This feature is particularly useful for homeowners who desire a well-manicured lawn. In contrast, the RB mower has 3 adjustable cutting heights ranging from 1.2" to 2". While this is sufficient for its target market, it does limit the customization options compared to the Greenworks model. The Greenworks mower's versatility makes it ideal for users who want to maintain larger and more diverse lawn types.
Weight and Maneuverability
The weight and maneuverability of the mowers cater to different user needs. The Greenworks mower is lightweight, allowing for easy pushing and maneuvering. However, specific weight details are not provided, making it difficult to compare directly. The RB mower, on the other hand, weighs only 11.5 lbs without the battery, emphasizing its ultra-light design. This lightweight construction, combined with features like one-hand steering and pivoting front wheels, makes the RB mower exceptionally easy to handle, especially in tight spaces. For users with limited strength or those who need to navigate corners, the RB mower may be the better option.
Noise Level
Noise levels are an important consideration for lawn mowers, especially in residential areas. The Greenworks mower is designed to be 30% quieter than gas mowers, making it a great choice for those who wish to maintain peace in their neighborhoods while mowing. The RB mower, while not specifically stated, is also a cordless model, which typically means it operates more quietly than gas alternatives. However, the Greenworks mower explicitly highlights its reduced noise levels, which may appeal to users sensitive to noise pollution.
Storage and Convenience
In terms of storage, the RB mower is particularly advantageous due to its space-saving design. It features a detachable aluminum handle and can be stored upright, saving up to 70% of space. This is an attractive feature for users with limited storage options. The Greenworks mower does not emphasize its storage capabilities, focusing more on performance features. For users living in smaller homes or apartments, the RB mower’s compact design may provide a significant convenience factor.
Safety Features
Safety is a key aspect of any lawn mower, and both models include features designed to protect users. The RB mower boasts an advanced safety design that automatically stops the motor if the mower is tilted beyond a certain angle, adhering to US safety standards. This is particularly beneficial for new users or those unfamiliar with operating a mower. While the Greenworks mower does not highlight specific safety features, it includes a warranty that covers both the tool and battery for three years, providing an additional layer of assurance for users.
Which should you buy?
Choosing between the Greenworks 40V 17" Cordless Lawn Mower and the RB 9" Small Lawn Mower for Small Spaces ultimately depends on your specific needs. If you have a medium-sized yard and require a versatile mower with adjustable cutting heights and longer runtime, the Greenworks model may be the better choice despite its higher price. However, if you have a small yard and prioritize budget, lightweight design, and compact storage, the RB mower offers excellent value at about 39% less than the Greenworks mower. Consider your yard size, budget, and storage options to make the best decision for your lawn care needs.

