Does Roomba handle dark floors better than most robot vacuums?

Yes, Roombas (specifically the i7, j7, and s9 series) are the most reliable on dark floors because they use a multi-sensor approach (IR plus acoustic and optical) that handles low-contrast surfaces better than most robot vacuums that rely solely on infrared sensors. Roborock and Dreame have improved but still occasionally get stuck on dark rugs or misjudge steps. No sensor is perfect, but Roomba gets closest.