The reason Roomba J7+ has superior navigation tech is the inclusion of a camera at the front along with an LED spotlight, which gives further data for the artificially intelligent hazard detection to work with
iRobot's NEW Mopping Roomba's EXPLAINED - Combo j9+ vs Combo j7+ vs Combo j5+ vs Combo i5+
iRobot Roomba Combo j5+ vs. iRobot Roomba Combo j7+
iRobot Roomba J7+ vacuum cleaner review: Cleans with precision
Review: Roomba J7 Plus solves the No. 1 robot vacuum problem - CNET
iRobot Roomba Combo j5+ vs. iRobot Roomba Combo j7+
Identifies and avoids obstacles like pet waste & cords so there is less pick up needed before cleaning starts. Self-emptying with Clean Base®
Roomba® j7+ Self-Emptying Robot Vacuum
iRobot Roomba j7+ Review - Vacuum Wars
Roomba Combo J7+ vs. J7+ Detailed Comparison
iRobot's Roomba Combo J7+ proves smart tech can be uncomplicated and utilitarian - Hindustan Times
iRobot Roomba J7+ vacuum cleaner review: Cleans with precision
iRobot Roomba J7+ vacuum cleaner review: Cleans with precision
Roomba Combo j7+ review: Is the 2-in-1 vacuum worth the splurge?
iRobot Roomba j7+ Review - Vacuum Wars