Roborock Saros Z70 vs S8 MaxV Ultra 2026: Is the Z70's Robotic Arm Worth $900 More?

By VacBotLab Editors · Updated June 2026 · 11 min read

Roborock makes two products that sit at the absolute top of the robot vacuum market in 2026: the Roborock S8 MaxV Ultra at $1,099 and the Roborock Saros Z70 at $1,999. Both are premium flagship machines. Both have self-empty self-wash docks, dual cameras, LiDAR mapping, and simultaneous mopping. The gap between them is $900 — and a robotic arm.

The Saros Z70's OmniGrip arm can physically pick up objects from your floor and move them. It sounds like science fiction — but it works. The question is whether that capability, plus significantly higher suction and next-generation AI, is worth the extra $900. After testing both machines, the VacBotLab team has a clear answer.

The OmniGrip Arm: What It Actually Does

The Roborock Saros Z70's defining feature is its 5-axis OmniGrip robotic arm. Using StarSight AI, the machine identifies small objects on the floor — socks, bottle caps, small toys, charging cables, lightweight shoes — and physically picks them up and deposits them in a collection bin on the dock.

In our testing: it worked reliably on objects under roughly 10cm and lighter than 30g. Socks, plastic bottle caps, small Lego pieces, lightweight cables — the arm handled all of these without human intervention. It failed on heavier items and anything wet.

The practical implication: you no longer need to pre-clear your floors before a cleaning run. The Saros Z70 does that preparation step for you. For busy households or anyone who regularly forgets to pick up before a scheduled clean, this changes the user experience fundamentally.

Suction: 22,000Pa vs 10,000Pa — Does It Matter?

The Saros Z70 operates at 22,000Pa. The S8 MaxV Ultra runs at 10,000Pa. On paper, the Z70 has more than double the suction. In practice, for typical household debris on hard floors and medium-pile carpet, both machines deliver clean results. The 22,000Pa advantage becomes meaningful on:

• • Thick-pile carpet (the Z70 pulls significantly more deeply)
• • Construction debris or sand tracked in from outdoors
• • Large debris volumes from multiple pets

For standard household use on hardwood, LVP, tile, or medium carpet: the 10,000Pa in the S8 MaxV Ultra is more than sufficient and the suction gap will not be perceptible in daily cleaning results.

Navigation: StarSight 3D vs ReactiveAI 3.0

The Saros Z70 uses StarSight AI — Roborock's next-generation 3D mapping system with multiple sensors and depth perception. It creates detailed 3D models of your rooms, identifies furniture legs, carpet edges, and door clearances with greater accuracy than any prior Roborock system.

The S8 MaxV Ultra uses ReactiveAI 3.0 with dual cameras, which is already class-leading for obstacle avoidance. In testing, both machines navigated complex room layouts without issue. The StarSight system is faster at initial mapping and more accurate at edge cases, but for typical open-plan living spaces, both systems perform at the same level day-to-day.

Edge Cleaning: FlexiArm vs Standard

The S8 MaxV Ultra includes Roborock's FlexiArm side brush, which extends dynamically to reach into corners and along baseboards. This is one of the S8 MaxV Ultra's most important advantages in its own price class. The Saros Z70 uses a standard side brush — the OmniGrip arm handles object pickup, but physical edge reach relies on conventional design. For tight corners and baseboards, the S8 MaxV Ultra's FlexiArm is arguably more practical than the Z70's arm.

Head-to-Head Specs

Who Should Buy Which

🤖 Roborock Saros Z70 — $1,999

• ✔ Floors regularly have small objects that need moving
• ✔ Very thick carpet (22,000Pa is a real advantage)
• ✔ Large complex home layout (3D mapping helps)
• ✔ You want the most advanced robot available, full stop
• ✔ Budget is not a constraint

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🏆 Roborock S8 MaxV Ultra — $1,099

• ✔ You want flagship performance at a lower price
• ✔ Edge and corner cleaning (FlexiArm advantage)
• ✔ Proven platform with 4,600 reviews at 4.7 stars
• ✔ Standard household floors where 10,000Pa is sufficient
• ✔ Save $900 with near-identical day-to-day cleaning results

Check Price on Amazon →

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