Roborock vs Narwal: Saros 20 vs Flow
Roborock’s flagship climbs and cleans edges harder on paper. Narwal’s Flow takes a different approach to mopping. Here’s how the numbers line up.
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Roborock and Narwal both sell flagship robot vacuum-mops with self-washing docks, but they mop in different ways. The Roborock Saros 20 uses spinning mop pads it can lift or drop off in the dock. The Narwal Flow uses a rolling track mop that is rinsed as it cleans. We compare the two on what each maker publishes, then cover the more affordable Roborock Qrevo Curv and Narwal Freo Z Ultra.
Short answer
Choose the Roborock Saros 20 for the strongest published specs: 36,000 Pa suction, double-threshold climbing up to 1.77 + 1.69 in, a 3.14-in-tall body, 212°F mop washing and Matter support. Choose the Narwal Flow if mopping is your priority and you like the idea of a continuously rinsed track mop with 12N pressure instead of spinning pads. Its specs are lower on suction and climbing (22,000 Pa; 1.6 in).
Check Roborock Saros 20 price (opens in a new tab)Check Narwal Flow price (opens in a new tab)
Roborock Saros 20 vs Narwal Flow: specs side by side
| Spec | Roborock Saros 20 | Narwal Flow |
|---|---|---|
| Suction (maker-rated) | 36,000 Pa | 22,000 Pa |
| Mopping system | Spinning mops; 8N, rising to 13N on tough stains | FlowWash rolling track mop, 12N, 113°F warm-water rinse |
| Mop lift / removal | Liftable mops and main brush; auto mop removal in the dock | 12 mm mop lift |
| Threshold crossing | Up to 1.77 + 1.69 in double threshold (3.46 in combined) | Up to 1.6 in (40 mm) |
| Carpet | Handles carpet pile up to 1.18 in | Not specified in our sources |
| Robot height | 3.14 in | 3.74 in (95 mm) |
| Robot size and weight | 13.90 × 13.78 × 3.14 in; 5.05 kg | Not specified in our sources |
| Obstacle recognition | 300+ obstacle types; VertiBeam side detection | 200+ object types; dual RGB cameras |
| Edge cleaning | FlexiArm Arc side brush reaches 0.79-in toe-kicks | Within 5 mm of edges (Narwal claim) |
| Dock mop wash / drying | 212°F wash; 131°F drying | Up to 176°F wash; 104°F drying |
| Auto-empty | Up to 65 days | 2.5 L bag, up to 120 days |
| Other dock features | Warm-water refill, auto detergent, 2.5-hour fast charge | Hot-water mop washing and drying |
| Smart home | Matter; Alexa, Siri, Google | Not specified in our sources |
| Dock size and weight | 15.00 × 18.70 × 19.21 in; 10.54 kg | Not specified in our sources |
Pros and cons
Roborock Saros 20: pros
- Highest maker-rated suction here (36,000 Pa)
- Climbs double thresholds up to 1.77 + 1.69 in
- Slim 3.14 in body for under furniture
- Auto mop removal for carpet runs
- Hottest mop wash (212°F) and Matter support
Roborock Saros 20: cons
- Spinning pads, if you prefer a rinsed track mop
- Large dock (15.00 × 18.70 × 19.21 in)
- Flagship pricing; check current prices
Narwal Flow: pros
- Track mop is rinsed with warm water as it cleans
- 12N mop pressure with 12 mm lift
- Large 2.5 L dust bag rated for up to 120 days
- Close edge cleaning (5 mm, Narwal claim)
Narwal Flow: cons
- Lower suction and climbing specs than the Saros 20
- Taller body (95 mm)
- Narwal publishes fewer dock and size specs
Who should buy which
On paper the Saros 20 is the more capable all-terrain robot: it climbs more, lists more suction, is slimmer and has more dock automation. The Narwal Flow is the more distinctive mopper, and its larger dust bag means fewer bag changes. If your home has tall thresholds, thick rugs or low furniture, lean Roborock. If it’s mostly hard floors and mopping quality matters most, the Flow is worth a close look.
Choose the Roborock Saros 20 if…
- You have tall thresholds or multi-level transitions
- You need a slim robot for low furniture
- You want Matter and the widest voice-assistant support
- You have a mix of carpet and hard floors
Choose the Narwal Flow if…
- Mopping is your main priority
- You prefer a continuously rinsed track mop to spinning pads
- You want the longest time between dust-bag changes
- Your thresholds are under 1.6 in
Step-down pair: Roborock Qrevo Curv vs Narwal Freo Z Ultra
| Spec | Roborock Qrevo Curv | Narwal Freo Z Ultra |
|---|---|---|
| Suction (maker-rated) | 18,500 Pa | 12,000 Pa |
| Mopping | Dual spinning mops at 200 rpm; 30 water levels | Rotating mops; Tile/Wood floor setting adjusts pressure and humidity |
| Mop lift | 10 mm | 12 mm |
| Threshold crossing | 3 cm; 4 cm double-layer | 20 mm (18 mm while mopping) |
| Robot height | 103 mm | 10.9 cm |
| Dock mop care | 167°F wash; 113°F drying | See Narwal |
| Wi-Fi | See Roborock | 2.4 GHz only |
The Qrevo Curv climbs higher and lists more suction. The Freo Z Ultra’s floor-material setting is useful if you have both tile and wood.
Frequently asked questions
Is Narwal better than Roborock for mopping?
They mop differently. Narwal’s Flow uses a rolling track mop rinsed with warm water as it cleans, while Roborock’s Saros 20 uses spinning pads with pressure that rises to 13N on detected stains. We don’t publish our own mopping test results. See owner reviews and our methodology.
Which climbs thresholds better?
On published specs, the Saros 20: up to 1.77 + 1.69 in double thresholds, compared with 1.6 in (40 mm) for the Narwal Flow.
Which has the bigger auto-empty capacity?
Narwal rates the Flow’s 2.5 L dust bag for up to 120 days. Roborock rates the Saros 20 dock for up to 65 days.
Do they work with Alexa or Google?
Roborock lists Matter plus Alexa, Siri and Google for the Saros 20. Check Narwal’s app page for current Flow integrations.
Is suction in Pa comparable between brands?
Not reliably. Each manufacturer measures it in its own way. Use Pa to compare models within one brand, not between brands.
Sources
Specifications were checked against the manufacturer pages, manuals and spec sheets below in October 2026. Makers revise specs and sell regional variants, so confirm the exact model number before you buy. We do not list prices because they change daily; use the retailer link to see the current price.
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