Head-to-Head Comparison
Polaris 9550 Sport vs Dolphin W20
Our pool experts compare features, filtration, specs, and value to help you pick the right robotic pool cleaner.
Dolphin W20 or Polaris 9550 Sport — which wins?
Our Recommendations
Neither the Polaris 9550 Sport nor the Dolphin W20 is a cleaner we carry. Here are the robots our pool experts recommend instead — proven Dolphin ProLine and Max-Series models, each backed by the full manufacturer warranty and our 30-day in-pool trial.
Dolphin Quantum
- myDolphin Plus App with Weekly Timer
- XXL MaxBin™ with NanoFilters
- 2 Year Warranty
- Built for Inground & Above Ground Pools up to 50ft
Dolphin Premier
- ProLine™ Commercial-Grade Motors
- Leaf Bag, NanoFilters, & More Included
- 3 Year Warranty
- Built for Inground & Above Ground pools up to 50ft
Clear S
- UltraBin Filter Basket with 4 UltraFilter Panels (1μm/180μm)
- Wi-Fi + Bluetooth App Control with Weekly Timer
- Built-in Water Temperature Display
- 3 Year Warranty - Built for Pools up to 50 ft
Side by Side
Feature Comparison
The features that matter most when comparing the Polaris 9550 Sport and Dolphin W20.
| Feature | 9550 Sport | W20 |
|---|---|---|
| Standard Filter | ||
| Dual Stabilizer | ||
| Anti-Tangle Swivel | ||
| 3-Year Warranty |
Explained
Compare Features in Detail
Dual Stabilizer
Essential for waterline cleaning, dual stabilizers let the unit cling to the walls for a more precise, deeper clean at the waterline — with increased agility and an easy pickup handle.
Anti-Tangle Cable Swivel
Say goodbye to tangled cords. An anti-tangle swivel lets the robot move 360° around your pool without the cord getting tangled, so you can sit back while it cleans. Learn more ›
Warranty Coverage
A robot is only as good as its warranty. Buying through an Authorized Dealer like Poolbots gets you the full manufacturer warranty — never pro-rated or limited by cleaning cycles — plus a 30-day in-pool trial with no restocking fees. Learn more ›
The Details
Specifications
| 9550 Sport | W20 | |
|---|---|---|
| Part Number | — | 99996904-US |
| Waterline Cleaning | — | No |
| Multi-Media® | No | No |
| Filters Included | — | 1 |
| Filter Cleaning | — | Bottom Access |
| Cleaning Coverage | — | Floor |
| Cleaning Cycle | — | 3 hours |
| Number of Brushes | — | 2 |
| Cable Length | — | 80 ft |
| Anti-Tangle Swivel | — | Yes |
| Pool Types | In Ground | In Ground |
| Maximum Pool Size | — | 68 ft |
| Pool Shape | — | Rectangular, Free Shape, Hopper, Kidney, Zero (beach) entry |
| Obstacles | — | Steps, Ladder, Drain Cover, Ledges, Pop-Ups |
| Surface | — | Gunite, Fiberglass, Vinyl, Liner |
| Media-Alert® | — | No |
| Automated Weekly Timer | — | No |
| Remote Operation | — | Yes |
| Restocking Fee | — | No |
| Warranty | — | 3 Years |
Go Deeper
Read Our Expert Reviews
Our in-depth reviews are written by pool experts to help you make an informed decision.
Polaris 9550 Sport
Read Polaris 9550 Sport ReviewDolphin W20
Read Dolphin W20 ReviewKeep Comparing
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What’s Next?
Still narrowing it down? These expert guides and tools make it easy to find the right pool robot for your pool — most ship free, same day.
Pool Robot Buying Guide
Everything to know before you buy your first robot.
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Robot Selector
Answer a few quick questions and get a recommendation.
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Videos
Watch reviews, comparisons, and expert how-tos.
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Pool Volume Calculator
Calculate your exact pool volume to find the right robot.
Read more →Try It in Your Own Pool for 30 Days
Every pool deserves an intelligent robot. If you don't love it, simply return it — we never charge a restocking fee. Free shipping on every order.
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