# iRobot Roomba j9+ vs Roborock S8 MaxV Ultra: specs and price compared

A sourced, side-by-side comparison of the iRobot Roomba j9+ (iRobot) and Roborock S8 MaxV Ultra (Roborock) among robot vacuums. Roborock S8 MaxV Ultra is the cheaper of the two at $799.99.

## Side by side

| Spec | iRobot Roomba j9+ | Roborock S8 MaxV Ultra |
| --- | --- | --- |
| US price | $899 | $799.99 |
| Brand | iRobot | Roborock |
| Released | 2023 | 2024-04 |
| Suction (Pa) | — | 10000 |
| Mapping | Imprint Smart Mapping (camera-based PrecisionVision Navigation) | PreciSense LiDAR Navigation |
| Self empty | Yes | Yes |
| Mopping | No | Yes |
| Battery min | — | 180 |
| Obstacle avoidance | PrecisionVision Navigation — recognizes and avoids pet waste, cords, shoes, socks | Reactive AI 2.0 — 3D structured light + RGB camera, 73 object types recognized |
| App | iRobot Home | Roborock |

## Key differences

- Mapping: iRobot Roomba j9+ Imprint Smart Mapping (camera-based PrecisionVision Navigation) vs Roborock S8 MaxV Ultra PreciSense LiDAR Navigation
- Mopping: iRobot Roomba j9+ No vs Roborock S8 MaxV Ultra Yes
- Obstacle avoidance: iRobot Roomba j9+ PrecisionVision Navigation — recognizes and avoids pet waste, cords, shoes, socks vs Roborock S8 MaxV Ultra Reactive AI 2.0 — 3D structured light + RGB camera, 73 object types recognized
- App: iRobot Roomba j9+ iRobot Home vs Roborock S8 MaxV Ultra Roborock

## What reviewers say

**iRobot Roomba j9+** — Only one whitelisted tester (TechHive) reviewed the exact vacuum-only Roomba j9+, hands-on with no lab bench numbers; it earned Editors' Choice for strong cleaning and obstacle avoidance. Other major reviews (Tom's Guide, TechRadar, Engadget) cover the mop-hybrid Combo j9+, a different config, so were excluded here. (1 sourced review.)

**Roborock S8 MaxV Ultra** — Two whitelisted hands-on reviews (TechRadar, TechHive) agree the Roborock S8 MaxV Ultra vacuums very well but mops only decently. TechRadar praises reliable suction across debris sizes; TechHive reports excellent hard-floor pickup and 100% rice removal on carpet. Neither ran a weighed lab bench, so no measured percentages are recorded. Both note mopping is mixed and that the product is expensive. TechRadar additionally flags an unreliable voice assistant and poor corner pickup by the extending brush. (2 sourced reviews.)

## Sources

- iRobot Roomba j9+: https://www.irobot.com/en_US/roomba-j9plus-self-emptying-robot-vacuum/J955020.html (irobot.com, verified 2026-06-15)
- Roborock S8 MaxV Ultra: https://us.roborock.com/products/roborock-s8-maxv-ultra (us.roborock.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/robot-vacuums/irobot-roomba-j9-plus-vs-roborock-s8-maxv-ultra/
Cite: Per The Front Desk Review, iRobot Roomba j9+ ($899) vs Roborock S8 MaxV Ultra ($799.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/robot-vacuums/irobot-roomba-j9-plus-vs-roborock-s8-maxv-ultra/
License: CC BY 4.0.