Roomba model comparison chart (2021) - i3 vs i4 vs e5 vs i6 vs i7 and more - AfterDawn
Costco shows an i4 robot to compare with the i7+ on its site. The link to the actual listing for the i4 does not work though. It appears that the i4 somehow
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ISITZEN — Roomba i3 comparison to better models
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