EGO Power+ ST1521S 15-Inch String vs Husqvarna 128LD Gas String Trimmer
Both made our Best String Trimmers for Steep Hills and Slopes shortlist, at #1 and #2. Here's how they differ and who each one suits.
- BuyOnceRight Research Desk
- Updated
- 4 min read
Quick verdict
Choose the EGO Power+ ST1521S 15-Inch String Trimmer if you want pivoting head locks cleanly into edging position without extra tools. Choose the Husqvarna 128LD Gas String Trimmer if you'd rather have 28cc engine holds RPM through woody stems and dense brush that stalls smaller trimmers. Overall we rank the EGO Power+ ST1521S 15-Inch String Trimmer higher: #1 versus #2 in our Best String Trimmers for Steep Hills and Slopes list.
Winner overall: EGO Power+ ST1521S 15-Inch String Trimmer
EGO Power+ ST1521S 15-Inch String Trimmer vs Husqvarna 128LD Gas String Trimmer compared
Every difference that matters, in one table.
| Attribute | ||
|---|---|---|
| Our ranking | #1 of 4 in Best String Trimmers for Steep Hills and Slopes | #2 of 4 in Best String Trimmers for Steep Hills and Slopes |
| Pick label | ||
| Brand | EGO | Husqvarna |
| Key features | 15-inch cutting swath with POWERLOAD auto-feed line; 56V ARC Lithium battery, 2.5Ah included; Carbon fiber split shaft | 28cc 2-cycle gas engine; 17-inch cutting swath; Straight shaft with Tap 'n Go head |
| Biggest strength | Pivoting head locks cleanly into edging position without extra tools | 28cc engine holds RPM through woody stems and dense brush that stalls smaller trimmers |
| Main trade-off | 56V battery and charger add cost versus 40V competitors | Requires mixed 2-cycle fuel and periodic carburetor maintenance |
| Best for | edging | thick weeds |
Which should you buy?

#1 pick
Choose the EGO Power+ ST1521S 15-Inch String Trimmer if…
- Pivoting head locks cleanly into edging position without extra tools
- POWERLOAD auto-feed threads new line in seconds, useful after a long edging session wears the line down
- 56V battery has enough torque to run the line against curb edges without bogging
Best for: edging
Prefer the alternative? See the Husqvarna 128LD Gas String Trimmer section.

#2 pick
Choose the Husqvarna 128LD Gas String Trimmer if…
- 28cc engine holds RPM through woody stems and dense brush that stalls smaller trimmers
- No battery to run down during an extended clearing session
- Click-on attachment compatibility allows swapping to a brush cutter blade for the thickest growth
Best for: thick weeds
Prefer the alternative? See the EGO Power+ ST1521S 15-Inch String Trimmer section.
Pros and cons of each
EGO Power+ ST1521S 15-Inch String Trimmer
Pros
- Pivoting head locks cleanly into edging position without extra tools
- POWERLOAD auto-feed threads new line in seconds, useful after a long edging session wears the line down
- 56V battery has enough torque to run the line against curb edges without bogging
- Carbon fiber shaft keeps the tool light for one-handed edging control
Cons
- 56V battery and charger add cost versus 40V competitors
- Proprietary EGO battery doesn't cross over to other brands
- No built-in guide wheel, so depth control is by feel
Husqvarna 128LD Gas String Trimmer
Pros
- 28cc engine holds RPM through woody stems and dense brush that stalls smaller trimmers
- No battery to run down during an extended clearing session
- Click-on attachment compatibility allows swapping to a brush cutter blade for the thickest growth
Cons
- Requires mixed 2-cycle fuel and periodic carburetor maintenance
- Heavier and louder than any battery model in this list
- Manual pull start each time versus instant trigger start on electric models
EGO Power+ ST1521S 15-Inch String Trimmer vs Husqvarna 128LD Gas String Trimmer: common questions
Which is better, the EGO Power+ ST1521S 15-Inch String Trimmer or the Husqvarna 128LD Gas String Trimmer?
Choose the EGO Power+ ST1521S 15-Inch String Trimmer if you want pivoting head locks cleanly into edging position without extra tools. Choose the Husqvarna 128LD Gas String Trimmer if you'd rather have 28cc engine holds RPM through woody stems and dense brush that stalls smaller trimmers. Overall we rank the EGO Power+ ST1521S 15-Inch String Trimmer higher: #1 versus #2 in our Best String Trimmers for Steep Hills and Slopes list.
What is the difference between the EGO Power+ ST1521S 15-Inch String Trimmer and the Husqvarna 128LD Gas String Trimmer?
The EGO Power+ ST1521S 15-Inch String Trimmer stands out because pivoting head locks cleanly into edging position without extra tools, while the Husqvarna 128LD Gas String Trimmer stands out because 28cc engine holds RPM through woody stems and dense brush that stalls smaller trimmers. The trade-offs differ too: the EGO Power+ ST1521S 15-Inch String Trimmer's main caveat is that 56V battery and charger add cost versus 40V competitors, and the Husqvarna 128LD Gas String Trimmer's is that requires mixed 2-cycle fuel and periodic carburetor maintenance.
Is the EGO Power+ ST1521S 15-Inch String Trimmer worth it over the Husqvarna 128LD Gas String Trimmer?
For most buyers, yes: it's our #1 pick. Consider the Husqvarna 128LD Gas String Trimmer instead if 56V battery and charger add cost versus 40V competitors is a deal-breaker for you.
Who should buy the Husqvarna 128LD Gas String Trimmer instead of the EGO Power+ ST1521S 15-Inch String Trimmer?
The Husqvarna 128LD Gas String Trimmer suits thick weeds, while the EGO Power+ ST1521S 15-Inch String Trimmer is best for edging.