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Both offer substantial water-and-detergent automation, but one uses a roller and the other rotating detachable mops. The best fit depends on flooring, rug routing and the maintenance you prefer.
This comparison is based on the UK listings and manufacturer information cited below. We have not tested these robots side by side, so the recommendation is about features and household fit rather than a measured cleaning winner.
Table of Contents
The differences that affect everyday use
| Feature | Eufy S1 Pro | Dreame L40s Pro Ultra |
|---|---|---|
| Mop system | HydroJet self-washing roller mop | Rotating, liftable and detachable mops |
| Included dock | Automatic dust emptying, water handling, mop care and detergent dispensing | Automatic dust emptying, hot mop washing and detergent handling |
| Navigation description | 3D MatrixEye with infrared and RGB camera sensing | Obstacle avoidance and app control |
| Advertised suction | Not used for comparison here | 19,000 Pa |
How your home changes the choice
Compare a complete ordinary clean, including returns to wash and the final dirty-water emptying. Do not let a long feature list obscure the small jobs that still happen every week.
Choose Eufy S1 Pro when…
Consider it for a hard-floor-led home where roller mopping and obstacle sensing justify the station space. A roller-mopping system with extensive dock automation and camera-based obstacle sensing.
Automatic detergent handling only helps if the correct compatible consumable is available and affordable.
Choose Dreame L40s Pro Ultra when…
Consider it when detachable mops and reduced brush wrapping matter more than choosing the simplest dock. A mixed-floor system with detachable mops and dual-brush hair management.
EasyLeap threshold claims depend on obstacle shape and conditions; measure the actual doorway and inspect the manual before relying on them.
Limitations to check before ordering
- The substantial dock still needs cleaning and replenishing. The listing warns against using it on large liquid spills.
- The L40s Pro Ultra is a different product from L40 Ultra, L40 Ultra AE and L40 Ultra A. Do not transfer prices or specifications between them.
Compare the complete UK purchase
Check the exact model, selected bundle and included station before comparing prices. Similar names can hide different mops, emptying systems or regional specifications. Include the parts you will regularly replace and the chores you will still do. Manufacturer and retailer descriptions establish advertised features; they do not provide an independent test of cleaning performance in your home.
| Check | What matters |
|---|---|
| Identity | Full model name, UK suitability and contents. |
| Ownership | Correct bags, filters, pads and solution availability. |
| Practical fit | Floor route, dock access and maintenance you can manage. |
Check the current UK offers
View Dreame L40s Pro Ultra on Amazon UK
Compare the selected bundle, seller and included accessories. Prices and availability can change; no fixed deal price or claimed saving is assumed here.
Related guidance
- How to Choose a Robot Vacuum: Complete Buyer's Guide
- Robot Vacuum Maintenance Tips UK: Keep Your Cleaner Running Smoothly
Sources and scope
Checked on 9 September 2026. Manufacturer instructions apply to the models they name; use your own exact manual for button sequences, removable parts and cleaning permissions. Product specifications are advertised claims. Examples illustrate decisions and are not hands-on test results.