Both the Dreame L40s Ultra and the Mova Z60 Ultra Roller Complete share a strong foundational feature set: HEPA and allergy filtration, full voice assistant compatibility (Google Assistant and Alexa), a 1-year warranty, and an estimated 100-day dust bin emptying interval. Their footprints are identical at 350 × 350 mm, so neither will have a clearance advantage in tight spaces.
The most meaningful differentiator in this group is audible noise. The Dreame L40s Ultra operates at 63 dB versus the Mova's 74 dB — an 11 dB gap that is not subtle. Because decibels are logarithmic, 74 dB is perceived as roughly twice as loud as 63 dB in everyday terms, which matters significantly if you run the robot while working from home or during nap times. The L40s Ultra is also lighter at 4,230 g compared to the Mova's 4,600 g, a 370 g difference that is mostly relevant during manual handling or maintenance. On the dock side, the L40s Ultra's station is noticeably more compact at ~91,830 cm³ versus the Mova's ~98,410 cm³, giving it a real-estate edge in smaller laundry rooms or hallways.
For this spec group, the Dreame L40s Ultra holds a clear advantage. Its significantly quieter operation is the standout win for most households, and its smaller, lighter profile — robot unit and dock alike — adds further practical appeal. The Mova Z60 Ultra matches it on filtration quality and smart-home integration, but cannot close the noise gap, which is the single most impactful daily-use metric here.