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Robot vacuum & mop comparison
Last updated 7 September 2026
The Dreame L20 Ultra and Roborock S8 Pro Ultra are the two dominant flagship robot vacuum and mop combos in the UK used market. Both retail around £1,099 new and trade used at £550–£720. Both include autonomous docks that self-empty, wash and dry the mop. The decision comes down to brand track record versus raw suction power and mop aggressiveness — and the Dreame is closing the gap fast.
Robot vacuum & mop
Robot vacuum & mop
| Aspect | Dreame L20 Ultra | Roborock S8 Pro Ultra |
|---|---|---|
| Suction | 7,000 Pa (manufacturer rated)✓ | 6,000 Pa (manufacturer rated) |
| Mop lifting | Vorfreude lift — auto-lifts on carpet detection | Extends/retracts mop — lifts 5 mm on carpet |
| Used price (UK) | £550–£720 | £580–£720 |
| Retail price (new) | £1,099 | £1,099 |
| Dock system | Self-empty, self-wash, hot-air mop dry | Self-empty, self-wash, self-refill (water)✓ |
| UK market track record | Growing — brand established 2020 | Longer — Roborock launched in UK 2017✓ |
| Spare parts UK | Good — readily available | Very good — widest ecosystem✓ |
| App quality | Dreame Home — comprehensive, English | Roborock Home — comprehensive, English |
| Best buy month | September | September |
Choose Dreame L20 Ultra
Choose the Dreame L20 Ultra if you want maximum suction power for deep-pile rugs or pet hair and prefer the hot-air mop drying system over water auto-refill. The L20 Ultra is also the right pick if you find a well-maintained unit at £550–£600 — the suction advantage is real at this price point.
Choose Roborock S8 Pro Ultra
Choose the Roborock S8 Pro Ultra if you prioritise brand longevity, the largest used-market spare parts ecosystem in the UK, and the established track record of Roborock's dock system. The dock auto-refill feature is unique to Roborock and genuinely useful in larger homes where water top-ups are inconvenient.
Bottom line
These machines are closer than any previous generation. For a pure vacuum-and-mop performance comparison, they are effectively equal. Choose Roborock for ecosystem trust and the water auto-refill dock; choose Dreame for maximum suction at the same price or if you prefer the hot-air mop dry. Either is an excellent used buy at £600 to £680.