# Roborock Saros 20 vs Roborock Saros Z70

As of Nov 11, 2026, the Roborock Saros 20 costs $1,600 and the Roborock Saros Z70 has no store price on file. The Roborock Saros Z70 scores higher in our ranking (5.9 vs 5.8 out of 10). Pick the Roborock Saros 20 for low furniture and tall thresholds. Pick the Roborock Saros Z70 for early adopters with mostly hard floors.

Prices checked Nov 11, 2026. HTML version: https://robotsforthat.com/vs/roborock-saros-20-vs-roborock-saros-z70/

## Side by side

| | Roborock Saros 20 | Roborock Saros Z70 |
|---|---|---|
| Price | $1,600 | n/a |
| 3 year cost | $1,600 | n/a |
| Our score | 5.8/10 | 5.9/10 |
| Rank in Floors | #51 | #48 |
| Status | on sale | on sale |
| Warranty | 1 year limited (Roborock US store) | 1 year limited per Roborock US store listings for its other robot vacuums; the Saros Z70 US page was not reachable to confirm |
| Suction | 36,000 Pa (brand claim); Vacuum Wars measured 15 CFM airflow | 22,000 Pa (brand claim); Vacuum Wars measured 0.3 kPa at the intake, below average, and 16 CFM airflow |
| Navigation | StarSight Autonomous System 2.0 with 3D ToF sensors and an RGB camera, no LiDAR turret | StarSight 2.0 camera and 3D ToF system with no LiDAR turret |
| Obstacle avoidance | Recognizes over 300 obstacle types (brand claim); Vacuum Wars scored 17 of 24 objects avoided | AI object recognition with VertiBeam side sensing; Vacuum Wars scored 22 of 24 |
| Mopping | Yes, dual spinning pads with up to 13 N pressure, FlexiArm extending pad, 20 mm lift on carpet | Yes, dual spinning pads with an extending pad, 22 mm lift on carpet, pads detach for vacuum only runs |
| Self empty | Yes, auto empties into a disposable bag; Roborock says a bag lasts up to 65 days | Yes, into a disposable bag (2.7 L per Vacuum Wars, 2.5 L per TechRadar) |
| Dock features | RockDock washes pads with water up to 212°F, dries at 131°F, auto refills water, doses detergent and dries the dust bag | Washes pads with 176°F water, dries at 131°F, doses detergent; 4 L clean and 3 L dirty tanks |
| Runtime | 6,400 mAh battery; BGR cites about 200 min per charge and about 150 min to recharge | 6,400 mAh battery, 180 min official runtime per Vacuum Wars; Vacuum Wars estimated 1,115 sq ft per charge |
| Dustbin | 260 mL onboard bin (Vacuum Wars) | 180 mL onboard bin, the smallest Vacuum Wars has tested |
| Height | 3.14 in (79.8 mm) robot height per Roborock | 3.14 in per Android Authority and Vacuum Wars |
| Pet hair | Vacuum Wars measured 88% flattened pet hair pickup and 0% hair wrap | Vacuum Wars measured 83% flattened pet hair pickup against a 92% average, and hair still tangled |
| App | Roborock app with Matter, Alexa and Google Home support plus built in voice control | Roborock app with remote arm control, multi floor maps and pet features |
| Threshold | Up to 3.46 in double layer thresholds with AdaptiLift Chassis 3.0 (brand claim); Vacuum Wars cleared a 57 mm single step | Up to 1.57 in (40 mm) per Roborock as reported by Android Authority and TechRadar |
| Best for | low furniture and tall thresholds | early adopters with mostly hard floors |
| Skip if | mopping is your top priority | you have a lot of carpet |

## What reviewers found

### Roborock Saros 20

- Vacuum Wars (3.81/5): Lab tests found 89% sand removal from carpet, 88% flattened pet hair pickup, 0% hair wrap, 17 of 24 obstacles avoided, a record 57 mm threshold climb and an above average combined mopping score; battery coverage was slightly below average at about 1,038 sq ft per charge. [Source](https://vacuumwars.com/roborock-saros-20-review/)
- CGMagazine (8.5/10): Performed strongly on pet hair, sand and fine dust on carpet and hard floors and fit under low furniture; reviewer flagged middling battery life, a small bin and trouble with loose cables. [Source](https://www.cgmagonline.com/review/hardware/roborock-saros-20-robot-vacuum/)
- Tom's Guide: Picked up 100% of cereal and kitty litter on carpet and 70% of pet hair on carpet, but mopping left floors streaky and patchy and the pads fell off once crossing a cable. [Source](https://www.tomsguide.com/home/home-appliances/roborock-saros-20-review)

### Roborock Saros Z70

- Vacuum Wars (3.17/5): Lab tests found top tier mopping with a combined score of 269 against a 171 average and 22 of 24 obstacles avoided, but only 67% sand removal from carpet and 83% pet hair pickup; the arm worked about half the time. [Source](https://vacuumwars.com/roborock-saros-z70-review/)
- TechRadar: Vacuuming was excellent on carpet and lino and mopping strong at edges, but the arm had no fully successful autonomous pickup and the review unit rattled while cleaning. [Source](https://www.techradar.com/home/robot-vacuums/roborock-saros-z70-review)
- Android Authority: Called it Roborock's best robot vacuum so far for navigation and cleaning, but the arm set socks and paper beside the bin rather than in it and does not justify the price over the Saros 10R. [Source](https://androidauthority.com/roborock-saros-z70-review-3558359)

## Questions buyers ask

### Which is better, the Roborock Saros 20 or the Roborock Saros Z70?

The Roborock Saros Z70 scores higher in our ranking (5.9 vs 5.8 out of 10). Pick the Roborock Saros 20 for low furniture and tall thresholds. Pick the Roborock Saros Z70 for early adopters with mostly hard floors.

### What is the difference between the Saros 20 and the Saros Z70?

Suction: 36,000 Pa (brand claim); Vacuum Wars measured 15 CFM airflow on the Saros 20, 22,000 Pa (brand claim); Vacuum Wars measured 0.3 kPa at the intake, below average, and… on the Saros Z70. Navigation: StarSight Autonomous System 2.0 with 3D ToF sensors and an RGB camera, no LiDAR turret on the Saros 20, StarSight 2.0 camera and 3D ToF system with no LiDAR turret on the Saros Z70. Obstacle avoidance: Recognizes over 300 obstacle types (brand claim); Vacuum Wars scored 17 of 24 objects… on the Saros 20, AI object recognition with VertiBeam side sensing; Vacuum Wars scored 22 of 24 on the Saros Z70.

Full reviews: [Roborock Saros 20](https://robotsforthat.com/robot/roborock-saros-20/index.md), [Roborock Saros Z70](https://robotsforthat.com/robot/roborock-saros-z70/index.md)