Introduction
When we talk about Roborock robot vacuum cleaners, we find two 2025 proposals that represent different philosophies within the catalogue of the world's leading brand in this sector. The Roborock Q7 L5 or BF presents itself as a compact and straightforward solution, focused on vacuuming with a basic mopping system. In contrast, the Roborock QV 35S opts for complete automation with a multifunction base and greater suction power.
The fundamental difference between these models is not only in their technical features, but in the level of user intervention they require. Whilst one needs manual emptying and mop cleaning, the other manages these tasks autonomously. This marks clearly differentiated usage profiles.
Power and Suction
The 2,000 Pa difference between both models may seem minor on paper, but in practice it represents a notable leap. The Roborock QV 35S reaches 10,000 Pa, which translates into better performance on carpets and greater capacity to pick up ingrained dirt. The Q7 L5 or BF, with its 8,000 Pa, remains in a sufficient range for hard floors and short-pile carpets.
Regarding the brushing system, the Q7 L5 or BF mounts a traditional bristle brush, effective but prone to hair tangles. The QV 35S uses a simple brush but adds an anti-tangle side brush, which makes a difference in homes with pets. Neither incorporates brush lift nor side extension for corners.
The dust bins show a curiosity: the Q7 L5 or BF has greater capacity with 400 ml compared to the 330 ml of the QV 35S. This is explained because the latter has auto-emptying at the base, reducing the need for a large bin on the robot itself.
Mopping
Here we find one of the most significant differences in this robot vacuum cleaner comparison. The Roborock Q7 L5 or BF equips a static mop with a 270 ml water tank, a basic system that dampens the floor without lifting capability. This means having to remove the mop manually if we want to avoid dragging it over carpets.
The Roborock QV 35S makes a qualitative leap with two rotating mops that lift 10 mm when detecting carpets or rugs. This system allows the robot to alternate between vacuuming and mopping without user intervention. The robot's water tank is reduced to 80 ml, but this becomes irrelevant when the multifunction base takes care of refilling and washing the mops during the cleaning process.
The QV 35S base washes the mops with cold water and dries them with cold air, keeping the mops clean between passes and preventing bad odours. The Q7 L5 or BF does not include these functions, requiring manual cleaning of the mop after each use. Neither model automatically detaches the mops nor detects dirt for re-mopping.
Navigation System
Both units mount a LiDAR 3D turret for mapping and navigation, guaranteeing precision in route plotting and space recognition. However, the Roborock QV 35S adds obstacle avoidance and the SmartPlan 1.0 system, which optimises cleaning routes according to the home's layout.
The Q7 L5 or BF does not incorporate obstacle avoidance, which means it relies exclusively on LiDAR and contact sensors. In homes with many objects on the floor, this may translate into a greater number of manual interventions. Neither includes an AI camera, pet recognition nor remote camera access.
Autonomy and Battery
The battery is one of the points where the Roborock QV 35S marks its distance. Its 5,200 mAh offers up to 180 minutes of continuous operation, sufficient to cover large homes in a single session. The Q7 L5 or BF remains at 3,200 mAh without specific autonomy data, which suggests use oriented towards smaller spaces or cleaning divided into several sessions.
For homes over 100 square metres, this difference can determine whether the robot completes cleaning without intermediate recharges. The QV 35S clearly positions itself as the option for large houses.
Smart Functions
Both robots overcome obstacles up to 20 mm, allowing transitions between rooms with small level changes or thick carpets. Both are compatible with external voice assistants such as Alexa or Google Home, facilitating control by voice commands.
The main difference lies in the SmartPlan 1.0 system of the Roborock QV 35S, which automatically adjusts cleaning routes. The Q7 L5 or BF works with standard navigation patterns without this intelligent optimisation.
Multifunction Cleaning Base
This section defines the leap between ranges. The Roborock Q7 L5 or BF does not include a multifunction base, only a charging base. This means manual emptying of the bin, filter cleaning and mop washing after each use.
The Roborock QV 35S incorporates a complete multifunction base with a 2.7-litre dust bag, 4-litre clean water tank and 3.5-litre dirty water tank. During mopping, the robot returns periodically to the base to wash the mops with cold water, ensuring it always mops with clean mops. When finished, it dries them with cold air to prevent bad odours.
This difference is decisive in the real usage experience. The QV 35S can operate for weeks without user intervention beyond refilling the clean water tank and emptying the dirty water one. The Q7 L5 or BF requires attention after each cleaning.
Dimensions
The Roborock Q7 L5 or BF is more compact with 325 mm diameter and 99 mm height. These measurements allow it to slip under more furniture and navigate tight spaces with greater ease. Its base occupies barely 160 mm wide, 101 mm high and 70 mm deep, ideal for discreet corners.
The Roborock QV 35S measures 353 mm diameter and 96.5 mm height. Although it is slightly lower, its larger diameter may limit access to certain spaces. The multifunction base requires considerably more space: 340 mm wide, 521 mm high and 487 mm deep. It's worth bearing this in mind before purchase.
For homes with low furniture or reduced spaces, the Q7 L5 or BF offers evident advantages in manoeuvrability.
Real Usage Experience
In small homes or flats up to 60-70 square metres, the Roborock Q7 L5 or BF performs perfectly. Its battery is sufficient to complete cleaning and its compact size facilitates movement. Manual maintenance is not excessively burdensome when we're talking about reduced spaces.
For large houses, families with pets or users seeking maximum autonomy, the Roborock QV 35S becomes the logical choice. Its greater suction power, anti-tangle side brush and multifunction base drastically reduce the time dedicated to maintenance. The mop lift allows complete cleaning to be scheduled without worrying about carpets.
The QV 35S mopping system makes a real difference: the rotating mops with automatic washing offer notably superior results to the static mop of the Q7 L5 or BF. In homes where mopping is a priority, this feature alone justifies the price difference.
Conclusion: Which to Choose?
Choose the Roborock Q7 L5 or BF if: You live in a flat or moderately sized home, you don't mind emptying the bin and cleaning the mop manually, you're looking for a compact robot that moves easily under low furniture, and you prefer a more economical solution without sacrificing Roborock reliability. Also if space for the base is limited.
Choose the Roborock QV 35S if: You have a large house that requires greater battery autonomy, you want to forget about maintenance for weeks thanks to the multifunction base, mopping is a priority and you value rotating mops with automatic washing, you live with pets and need the anti-tangle side brush, or you simply seek the best robot vacuum cleaner in terms of complete automation. Mind you, make sure you have sufficient space for the multifunction base.
