Introduction
The Cecotec Conga X70 and the Dreame L40s Pro Ultra represent two high-end propositions within the robot vacuum market of 2025. Both units feature a multifunction base that automates the washing and drying of mops, which marks a substantial difference compared to more basic models. However, the technical differences between them are notable and may prove decisive depending on the type of home and the user's needs.
The Cecotec model opts for a reduced height and compact design, whilst the Dreame unit incorporates more advanced technology in navigation, object recognition and intelligent functions. This robot vacuum comparison details the real technical differences to help you decide which robot to choose according to your home.
Power and Suction
The suction power shows a significant difference: the Dreame L40s Pro Ultra reaches 19,000 Pa versus the 15,000 Pa of the Cecotec Conga X70. This 4,000 Pa advantage can make the difference on medium or long pile carpets, where greater capacity for extracting embedded dirt is required.
The brushing system presents fundamental differences. The Cecotec robot vacuum uses a conventional bristle brush, which tends to accumulate hair and requires more manual maintenance. The Dreame robot vacuum features a double HyperStream brush, specifically designed to prevent hair tangles. In homes with pets, this difference is particularly relevant.
The main brush of the Dreame L40s Pro Ultra can be lifted during mopping, something the Conga X70 does not allow. This prevents the brush from getting wet and soiling the mops during wet cleaning. Additionally, the side brush of the Dreame model is extendable, liftable and anti-tangle, whilst the Cecotec's lacks all three of these features. The extendable side brush improves cleaning in corners, a typically problematic area.
Mopping
Both models employ two rotating mops for mopping, a more effective system than traditional drag mops. Both feature mop extension to better reach edges, although the Dreame also incorporates the Roboswing system, which allows lateral movement of the robot to introduce the mop under furniture or protrusions.
Mop lifting differs slightly: 8 mm in the Cecotec Conga X70 and 10.5 mm in the Dreame L40s Pro Ultra. Those additional 2.5 mm can prove useful when passing over short pile carpets without wetting them. More relevant is that the Dreame can automatically detach the mops at the base when you only need to vacuum, a function the Conga X70 does not offer.
The dirt detection system marks another important difference. The Dreame L40s Pro Ultra identifies dirt both on the mops and on the floor, which allows it to re-clean particularly dirty areas or wash the mops again when it detects they are too soiled. The Cecotec model lacks this detection capability, so it follows standard cleaning patterns without adapting to the actual level of dirt.
Navigation System
Both robots use 3D LiDAR turret and front 3D laser sensor to map and navigate the home. However, the camera system marks a substantial difference. The Cecotec Conga X70 incorporates a basic AI camera, whilst the Dreame L40s Pro Ultra features dual cameras capable of recognising up to 180 different objects.
This recognition capability translates into practical functions that the Conga X70 does not offer: pet identification, curtain detection and night vision LED for navigating in low-light conditions. Remote access to the Dreame's camera allows you to monitor the home from your mobile, a function that can prove useful for watching pets or checking the state of the property.
The Dreame's CleanGenius system analyses the level of dirt and automatically adjusts suction power and water flow. AI stain recognition allows it to identify areas requiring greater attention. The Cecotec does not have these adaptive intelligent cleaning capabilities.
Autonomy and Battery
Both units feature 5,200 mAh batteries, a generous capacity for high-end robots. The Dreame L40s Pro Ultra declares an autonomy of 220 minutes, data that Cecotec does not specify in its technical specifications. This autonomy is more than sufficient for homes of up to 200-250 m² in a single cleaning cycle.
Intelligent Functions
The ability to overcome obstacles shows different figures: the Cecotec Conga X70 can navigate steps of up to 30 mm, whilst the Dreame L40s Pro Ultra overcomes single steps of 40 mm. This can prove relevant in homes with pronounced transitions between rooms or with thick carpets.
The Dreame L40s Pro Ultra incorporates its own voice assistant, which allows you to control it using voice commands without needing to use your mobile. It also offers compatibility with external assistants such as Alexa or Google Home. The Cecotec robot vacuum does not include either of these two voice control options.
Multifunction Cleaning Base
The differences in the base are significant. The Dreame L40s Pro Ultra washes the mops with hot water, whilst the Cecotec Conga X70 uses cold water. Hot water improves the removal of grease and adhered dirt, an important aspect in kitchens or high-traffic areas. Both dry the mops with hot air, which helps prevent bad odours.
Self-cleaning of the washing tray is another exclusive advantage of the Dreame model, which incorporates a third-generation system to keep the area where the mops are washed clean. The Cecotec requires manual cleaning of this tray, which increases maintenance tasks.
The Dreame includes a detergent tank that dispenses product during mop washing, a function the Conga X70 does not offer. Additionally, there is an optional kit to connect the Dreame to water pipes, although it must be purchased separately.
Regarding capacities, the Dreame's dust bag has 3.2 litres versus the Cecotec's 2.5. The clean water tanks are 4.5 litres in the Dreame and 4 litres in the Cecotec; dirty water is stored in 4 litres and 3.5 litres respectively. These differences can translate into greater autonomy between emptying in large homes.
Dimensions
The Cecotec Conga X70 measures 340 mm in diameter and 110 mm in height. The Dreame L40s Pro Ultra has 350 mm in diameter but only 103.8 mm in height. Those 6.2 mm less allow the Dreame to access under lower furniture, such as some sofas or beds with little separation from the floor.
The Cecotec's base occupies 340 x 425 x 450 mm, whilst the Dreame's measures 340 x 456.7 x 590.5 mm. The greater height of the Dreame's base is due to the larger tanks and the tray self-cleaning system. It is advisable to measure the available space before deciding.
Real-world experience
For homes with pets, the Dreame L40s Pro Ultra offers clear advantages: double HyperStream anti-tangle brush, greater suction power, specific pet recognition and remote camera access. The Cecotec Conga X70, with its conventional bristle brush, will require more frequent manual cleaning.
In large homes, the greater tank capacity of the Dreame and its declared autonomy of 220 minutes are more suitable. Dirt detection and the CleanGenius system also optimise water and battery consumption by adapting cleaning to the actual needs of each area.
The reduced height of the Dreame facilitates cleaning under low furniture, whilst the Cecotec, with its 110 mm, may have limitations in very tight spaces. For users who value total automation, hot water washing, tray self-cleaning and automatic mop detachment of the Dreame minimise manual maintenance.
Conclusion: Which to choose?
Choose the Cecotec Conga X70 if you are looking for a robot vacuum with multifunction base at a presumably more competitive price, your home does not exceed 100-120 m², you do not have pets that shed a lot of hair and you do not need advanced object recognition or voice control functions. Its lower base height can be advantageous if you have limited vertical space.
Choose the Dreame L40s Pro Ultra if you share your home with pets, you have a large home requiring greater autonomy and tank capacity, you value minimal maintenance with hot water mop washing and tray self-cleaning, you need to access under very low furniture thanks to its 103.8 mm height, or you want to take advantage of intelligent functions such as dirt detection, 180-object recognition, remote camera access and voice control. The 4,000 Pa difference in suction power and the anti-tangle brushing system justify the choice in homes with carpets or pets.
