The present review is aimed to compare two robot vacuums - iRobot Roomba 671 vs iRobot Roomba S9plus. Based on our rating, Roomba 671 has the overall rating of 6.7 out of 10 versus 8.5 for Roomba S9plus.
Advantages iRobot Roomba 671 over iRobot Roomba S9plus
Lower noise level, 64 dB vs 70 dB
Larger dust bin capacity, 600 ml vs 400 ml
Advantages iRobot Roomba S9plus over iRobot Roomba 671
Better suction power, 2000 PA vs 1000 PA
A Virtual Wall creates an invisible barrier that Roomba S9plus won't cross
Roomba S9plus has mapping function that can map your area and uses smart path planning to clean more efficient
When you want to give your area an intense clean, intensive mode will increase suction power
Common features and specifications
Both robot vacuums are Wi-Fi enabled
Dry cleaning mode
One side brush
Single room mode
Equal battery life: 60 min
A noticeable difference between two models is the size, which is 34 x 8.8/13.4 x 3.5 (D x H) cm/inches for the Roomba 671 and 30.9 x 8.8/12.2 x 3.5 (D x H) cm/inches for the Roomba S9plus. The weight of the Roomba 671 is 2.2/5 kg/lbs, and for the Roomba S9plus it is 3.6/8.1 kg/lbs.