The only distinction between these two models is that the j7+ has an auto-emptying feature, while the j7 does not.
Roomba J7+ review: iRobot's smartest robot vacuum ever
iRobot Roomba Combo j9+ vs. Roomba Combo j7+
COMPARISON - iRobot J7+ Robot Vacuum -vs- J7+ COMBO w/ Mop - Differences? Bigger Battery?
iRobot Roomba® j7 Series Robot Vacuums, iRobot®
Roomba j7 vs. j7+: Which is best for you?
With New Roomba j7, iRobot Wants to Understand Our Homes - IEEE Spectrum
iRobot Roomba® j7 Series Robot Vacuums, iRobot®
iRobot Roomba Combo j5+ vs. iRobot Roomba Combo j7+
Unreleased model? The back looks a bit different than a J7. : r/roomba
iRobot Roomba j7 (7150) Wi-Fi Connected Robot Vacuum - Identifies and avoids Obstacles Like pet Waste & Cords, Smart Mapping, Works with Alexa, Ideal for Pet Hair, Carpets, Hard Floors, Roomba
Roomba j7 vs j7+: Is There Even a Difference?
iRobot Roomba j7/j7+ Review
Roomba j7+ Review: It's iRobot's Best Robot Vacuum Yet
Roomba j7+ Review: It's iRobot's Best Robot Vacuum Yet
Dyson vs iRobot Roomba review: Which robot vacuum is best?