Quick takeaway
Sun Joe iON16LM 40V leads this matchup 0 to 0 on measured spec rows and by 100 points overall. Greenworks 40V 20 inch Cordless is also about $90.00 cheaper at the latest tracked price.
Greenworks 40V 20 inch Cordless vs Sun Joe iON16LM 40V
Choose Greenworks 40V 20 inch Cordless if...
Pick Greenworks 40V 20 inch Cordless if its current price, brand, or design fits your shortlist better than Sun Joe iON16LM 40V.
Choose Sun Joe iON16LM 40V if...
Pick Sun Joe iON16LM 40V if its current price, brand, or design fits your shortlist better than Greenworks 40V 20 inch Cordless. It currently costs about $90.00 more, so make sure those wins matter to you.
Side-by-side specs
This is the raw comparison view. It is there for the rows that actually decide the purchase, not just the headline winner badge.
Battery and power
| Spec | Greenworks 40V 20 inch Cordless | Sun Joe iON16LM 40V |
|---|---|---|
| Power Source | Battery (cordless) | Battery (cordless) |
| Voltage | 40V | 40V |
Dimensions
| Spec | Greenworks 40V 20 inch Cordless | Sun Joe iON16LM 40V |
|---|---|---|
| Deck Size | 20-inch | - |
| Weight | 60-80 lb (battery + tool) | 60-80 lb (battery + tool) |
General
| Spec | Greenworks 40V 20 inch Cordless | Sun Joe iON16LM 40V |
|---|---|---|
| Brand | Greenworks | Sun |
| Category | Lawn mower | Lawn mower |
| Type | Walk-behind | Walk-behind |
The verdict
Based on 9 spec comparisons plus user ratings, the Sun Joe iON16LM 40V comes out ahead with a stronger overall score.
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Comparison FAQ
These answers explain how the score is built, when the lower-scoring option still makes sense, and what to confirm before you buy.
What is the Greenworks 40V 20 inch Cordless vs Sun Joe iON16LM 40V score measuring?
VSFinder compares 4 visible spec rows, then blends those wins with current price and Amazon rating signals so the page reflects both raw specs and real shopping context.
When does the lower-scoring option still make sense?
The lower-scoring model can still be the better buy if the few areas where it wins line up with how you shop. That matters most when those wins cover the exact features you care about more than the overall leader.
What should I confirm before I buy?
Confirm the live Amazon listing for price and availability, then double-check the few spec rows that matter most to your use case. We currently track $369.99 for Greenworks 40V 20 inch Cordless and $459.99 for Sun Joe iON16LM 40V.