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iRobot NZ (and Aus) lists both the i2 & i3 with a $400 difference. The i2 spec list highlights the same mapping capabilities as the i3 : r/roomba
iRobot - TSC.ca
iRobot Roomba® i3 Series Robot Vacuums | iRobot® | iRobot
Irobot I3 Vacuum Cleaner Bag | Roomba I7 Replacement Parts | Roomba I7 Vacuum Bags - Vacuum Cleaner Parts - Aliexpress
Amazon.com - iRobot Roomba i4 EVO (4150) Wi-Fi Connected Robot Vacuum – Now Clean by Room with Smart Mapping Compatible with Alexa Ideal for Pet Hair Carpets & Hard Floors, Roomba i4
Roomba i3+ Review: Lower cost, but not less capable
iRobot Roomba® i3 Series Robot Vacuums | iRobot® | iRobot
iRobot Roomba i3+ vacuum cleaner Review: The price of lazy is not cheap
iRobot Roomba i3 EVO (3150) Wi-Fi Connected Robot Vacuum – Now Clean by Room with Smart Mapping Works with Alexa Ideal for Pet Hair Carpets & Hard Floors, Roomba i3 : Amazon.ca: