iRobot Roomba 104 VS Lefant M330 Pro

Both the iRobot Roomba 104 and the Lefant M330 Pro share a surprisingly identical set of core general features: both carry a HEPA allergy filter, operate at 60 dB of audible noise, and integrate seamlessly with both Google Assistant and Alexa. They also share a 1-year warranty. For users focused on smart home compatibility or air filtration quality, these two robots are effectively tied.

Where they diverge meaningfully is in physical dimensions and weight. The Roomba 104 is noticeably larger — 335 mm wide versus the M330 Pro's 280 mm — and taller at 104 mm compared to 95 mm. This translates into a significantly larger overall volume: 11,671 cm³ for the Roomba versus 7,448 cm³ for the Lefant, a difference of over 36%. In practical terms, the M330 Pro's slimmer, more compact body gives it a real edge in navigating under low-clearance furniture such as beds and sofas. The Roomba 104 also weighs 2,926 g compared to the M330 Pro's 3,310 g, making it lighter and slightly easier to carry between floors.

Overall, neither robot dominates this category outright. The Lefant M330 Pro holds a clear size advantage — its smaller footprint and lower height allow it to reach spaces the Roomba 104 simply cannot. However, the Roomba 104 has the edge in portability due to its lower weight. If under-furniture cleaning access is a priority, the M330 Pro wins this group; if ease of manual handling matters more, the Roomba 104 has a slight advantage.

Across most features, the Roomba 104 and the M330 Pro are closely matched: both support no-go zones, obstacle and anti-fall sensors, route mapping, voice prompts, auto docking, smartphone control, and scheduling. Neither offers mopping in any form, and neither is self-emptying — so users needing hands-free bin management will have to look elsewhere regardless of which model they choose.

The meaningful splits come down to two features pulling in opposite directions. The Roomba 104 supports virtual barriers — a significant practical tool that lets users block off specific areas of a room without relying solely on app-based no-go zones, giving more flexible spatial control. The M330 Pro lacks this entirely. On the flip side, the M330 Pro includes a physical remote control, which can be genuinely useful for users who prefer not to reach for a smartphone for simple commands. The Roomba 104 has no remote. The other notable divergence is connectivity: the Roomba 104 supports Wi-Fi, enabling app-based control and cloud features, while the M330 Pro — despite listing a Wi-Fi version in the spec sheet — explicitly does not support Wi-Fi, meaning its smartphone control likely relies on Bluetooth or infrared rather than a persistent home network connection. This limits remote access when away from home.

On balance, the Roomba 104 holds a clearer feature advantage for connected, app-centric households: Wi-Fi support and virtual barriers together offer more granular control over cleaning zones and remote management. The M330 Pro's remote control is a convenience perk but a narrower benefit. Users who want robust smart home integration will find the Roomba 104 better equipped in this category.

The design specs for these two robots are sparse but reveal a couple of genuinely useful distinctions. Dustbin capacity is nearly identical — 0.4 l for the Roomba 104 versus 0.45 l for the M330 Pro — a 12.5% difference that is unlikely to be noticeable in day-to-day use. Neither robot features a display or automatic height adjustment, so those are non-factors in this comparison.

The single most impactful design differentiator is the M330 Pro's twin side brushes. A dual side-brush setup sweeps debris toward the main suction path from both sides simultaneously, which is particularly effective at cleaning along walls and into corners — areas where a single brush can leave behind dirt on the unswept side. The Roomba 104 relies on a single side brush, which is the more traditional configuration but inherently covers less edge area per pass.

For this group, the M330 Pro has a clear design edge, driven entirely by its twin side brushes. The marginal dustbin advantage it also holds adds little weight on its own, but the brushing configuration is a meaningful real-world advantage for users who prioritize thorough edge and corner cleaning.

Cleaning versatility is close between these two robots, with both handling all floor types and offering mopping capability. The M330 Pro edges ahead with 5 cleaning modes compared to the Roomba 104's 4 — an extra mode that gives users one more way to tailor the robot's behavior to different cleaning situations, whether that means a dedicated quiet mode, a more aggressive deep-clean pass, or a specific floor-type preset.

The more substantive differentiator runs the other way: the Roomba 104 includes a dirt sensor, while the M330 Pro does not. A dirt sensor allows the robot to detect areas of concentrated debris and automatically increase suction or make additional passes over those spots. In practice, this means the Roomba 104 can intelligently allocate more effort where the floor is actually dirtier — a meaningful advantage in homes with high-traffic zones, pets, or uneven dirt distribution. Without this sensor, the M330 Pro cleans with uniform intensity regardless of what it encounters. Neither robot features UV light sanitization, so that is a non-issue for both.

This group comes down to a trade-off: the M330 Pro offers slightly more cleaning mode variety, but the Roomba 104's dirt sensor delivers smarter, adaptive cleaning — a functionally deeper advantage. For users who prioritize cleaning intelligence over mode count, the Roomba 104 holds the edge in this category.

The power specs here tell an counterintuitive story. The Roomba 104 carries a larger 3000 mAh battery, yet delivers only 120 minutes of runtime. The M330 Pro, despite a smaller 2600 mAh cell, runs for 150 minutes — a full 25% longer per charge. This strongly suggests the M330 Pro operates with significantly greater power efficiency, drawing less energy per minute of operation. For users with larger homes, that extra 30 minutes of runtime per cycle can be the difference between completing a full clean and needing a mid-job recharge.

Charge time is identical at 4 hours for both, and both feature auto-off to prevent overcharging — so neither robot holds any advantage on those fronts. The competition in this group is entirely shaped by the runtime gap.

Despite holding the larger battery, the Roomba 104 is outpaced in practical endurance. The M330 Pro has a clear power advantage: its superior energy efficiency translates directly into more floor coverage per charge cycle, making it the stronger choice for larger spaces or users who want fewer interruptions during a cleaning session.