Introduction
The Roborock QV 35S and the Dreame X50 Ultra Blanca represent two 2025 proposals competing in the robot vacuum segment with multifunctional base stations. Whilst Roborock consolidates its position as a global benchmark in the sector with a model that focuses on effective simplicity, Dreame presents a device packed with advanced technology and artificial intelligence features. Both models are designed for users seeking complete home maintenance automation, albeit with clearly differentiated technical approaches.
The Roborock QV 35S is aimed at those who value the brand's proven reliability and a solid cleaning system without unnecessary complications. The Dreame X50 Ultra Blanca, on the other hand, targets users who prioritise the latest available technology, especially in intelligent navigation and mopping customisation.
Power and Suction
The most evident difference in this section is marked by suction power. The Roborock QV 35S reaches 10,000 Pa, a competent figure for most domestic situations. The Dreame X50 Ultra Blanca doubles this figure with 20,000 Pa, which translates into greater capacity to extract ingrained dirt from carpets or suction heavy particles.
The brushing system also presents important contrasts. The Roborock model features a simple conventional main brush, whilst the Dreame incorporates the dual HyperStream brush, specifically designed to prevent hair tangles. This detail is especially relevant in homes with pets, where hair accumulation can become a recurring problem.
As for the side brush, the Roborock maintains a fixed design that fulfils its basic perimeter sweeping function. The Dreame, however, integrates an extendable and liftable side brush during mopping, which improves cleaning in corners and prevents the brush from interfering when the mop is activated. Both models include anti-tangle technology on the side brush.
Neither lifts the main brush during mopping, although the Dreame X50 Ultra does have this function, which allows cleaner mopping without dragging previously vacuumed dry dirt.
Mopping
Both devices feature a dual rotating mop system, but the similarities end there. The Dreame X50 Ultra Blanca incorporates mop extension with Roboswing movement, allowing the robot to mop edges better and adapt to furniture protrusions. The Roborock QV 35S lacks this function, limiting itself to conventional mopping without reaching perimeter areas with the same effectiveness.
Mop lifting is practically identical: 10 mm on the Roborock and 10.5 mm on the Dreame, sufficient to traverse medium-thickness carpets without wetting them. However, the Dreame adds the ability to automatically detach the mops at the base when only vacuuming is desired, something the Roborock does not offer.
Mop washing marks another substantial difference. The Roborock washes the mops with cold water and dries them with cold air, a functional but less efficient system. The Dreame uses hot water for washing and hot air for drying, speeding up the process and improving hygiene by eliminating bacteria more effectively. Additionally, the Dreame includes third-generation tray self-cleaning, UV disinfection and detergent tank, features absent on the Roborock model.
Dirt detection also differentiates these models. The Dreame X50 Ultra detects both dirt on the mops and on the floor, adjusting mopping as necessary. The Roborock QV 35S does not have this technology.
Navigation System
The Roborock QV 35S is equipped with a 3D LiDAR turret that guarantees precise mapping and orderly navigation, the standard that has consolidated the brand. It includes basic obstacle avoidance and the SmartPlan 1.0 system for intelligent route planning.
The Dreame X50 Ultra Blanca considerably raises the technological level. Its retractable LiDAR combines with dual AI camera, front 3D laser sensor and night vision LED. This assembly allows recognition of up to 200 different types of obstacles, specifically identifies pets, detects curtains to avoid tangling and offers remote camera access for home surveillance. The AI Sage 13.0 Octa-core processor and the CleanGenius AI system manage all this information to optimise cleaning autonomously, including stain recognition through artificial intelligence.
For homes with pets or complex environments with many objects on the floor, the difference in navigation capability is notable in practice.
Autonomy and Battery
The Roborock QV 35S features a 5,200 mAh battery that provides 180 minutes of autonomy. The Dreame X50 Ultra Blanca increases capacity to 6,400 mAh, but curiously maintains the same 180 minutes of declared autonomy. This apparent contradiction is explained by the higher energy consumption derived from its doubled suction power and its multiple active AI systems.
In practice, both models offer sufficient autonomy for medium-large sized homes in a single cleaning session, automatically returning to the base for recharging when necessary.
Smart Features
The Roborock QV 35S can overcome obstacles up to 20 mm in height, sufficient to transit between rooms with small level changes or thick carpets. The Dreame X50 Ultra Blanca incorporates an advanced system for overcoming simple steps, although the exact height is not specified, suggesting capabilities above standard.
An exclusive feature of the Dreame is its integrated built-in voice assistant, which adds to the Alexa and Google Home compatibility that both models share. This allows interaction with the robot without depending on external ecosystems.
Multifunctional Cleaning Base
Both bases include auto-emptying of the dust bin, mop washing and drying, but the differences in features are considerable. The Roborock QV 35S offers a functional base with a 2.7-litre dust bag, 4-litre clean water tank and 3.5-litre dirty water tank. It washes the mops with cold water and dries them with cold air.
The Dreame X50 Ultra Blanca significantly expands capabilities: 3.2-litre dust bag, 4.5-litre clean water tank and 4-litre dirty water tank. It incorporates third-generation tray self-cleaning, UV disinfection of the system, detergent tank for automatic dosing and compatibility with plumbing connection kit (purchasable separately). Hot water washing and hot air drying complete a more advanced maintenance system.
These differences translate into less manual intervention and greater long-term hygiene on the Dreame model.
Dimensions
The Roborock QV 35S measures 353 mm in diameter and 96.5 mm in height. The Dreame X50 Ultra Blanca slightly reduces the diameter to 350 mm and significantly lowers the height to 89 mm. Those 7.5 mm of difference allow the Dreame to access under furniture where the Roborock would not reach, a relevant detail for cleaning under low sofas or beds with little clearance.
The bases present similar dimensions in width (340 mm both), but differ in height and depth. The Roborock base measures 521 mm high and 487 mm deep, whilst the Dreame reaches 590.5 mm in height but reduces depth to 456.7 mm. These data should be considered according to the available space to locate the cleaning station.
Real-World Usage Experience
The Roborock QV 35S is suitable for medium-sized homes where reliability and simple maintenance are prioritised. Its 3D LiDAR navigation system guarantees precise mapping and orderly cleaning, albeit without advanced object recognition capabilities. The 10,000 Pa power is sufficient for hard floors and thin carpets.
The Dreame X50 Ultra Blanca adapts better to large homes with pets, thanks to its dual anti-tangle brush, greater suction power and specific animal recognition. Mop extension with Roboswing improves perimeter mopping, whilst dirt detection optimises results without manual intervention. Its lower height allows it to access more spaces under furniture.
For users who value total automation, the Dreame offers clear advantages: automatic mop detachment, hot water washing, hot air drying, tray self-cleaning and UV disinfection drastically reduce manual maintenance. The detergent tank and the possibility of connecting to plumbing (with optional kit) complete an ecosystem designed to forget about cleaning.
Conclusion: Which to Choose?
Choose the Roborock QV 35S if you're looking for a reliable robot vacuum from an established brand, you value simplicity of use without unnecessary technological complications, your home is medium-sized without pets and you prefer an effective cleaning system without paying for advanced features you may not need. Also if you have more space under furniture and the robot's height is not limiting.
Choose the Dreame X50 Ultra Blanca if you have pets and need an effective anti-tangle system, you live in a large home where the 20,000 Pa power makes a difference, you want total automation with minimum manual maintenance, you value improved perimeter mopping with mop extension, you need to access under low furniture thanks to its 89 mm height, or you simply want the most advanced navigation technology available with recognition of up to 200 obstacles and remote camera access. The base system with hot water, hot air and UV disinfection justifies the investment for those seeking superior hygiene and maximum convenience.
