Which is better for pet hair?

Neither listing states pet-hair performance. The 675 has the stronger rating (4.1 from 891) and costs far less, while the 205's edge is its compacting base, not brush specs.

Is the Roomba 205 worth the extra money?

Only if less-frequent emptying matters to you. At $199.99 at Target as of November 7, 2026 versus $71.00 recorded for the 675, you pay about $129 for the DustCompactor base and Siri support.

Which one lasts longer?

There is no reliability data in either listing. The 675 has a much larger rating base (891 versus 163), which gives more evidence about how owners rate it over time.

Do both work with Alexa and Google Assistant?

Yes. Both list Google Assistant and Amazon Alexa. The 205 also lists Siri; the 675 does not.

Which is better for a small apartment?

The 205 states a 5.8-inch cleaning path, which helps in tight spaces, and its compacting base means fewer trips to the trash. The 675 is lighter at 7 lb and much cheaper.

Which has the bigger bin?

The 675 lists a 0.2 gal capacity. The 205 does not state capacity, but its DustCompactor base compacts debris, so it should go longer between empties.

iRobot Roomba 205 DustCompactor vs iRobot Roomba 675

Buy the Roomba 675 if you want a proven, cheap Wi-Fi robot vacuum: it is rated 4.1 from 891 ratings and its only recorded price since November 2, 2026 is $71.00. Buy the Roomba 205 if you want the DustCompactor base that compacts debris so you empty it less often, but note it is rated 3.6 from 163 ratings and costs $199.99 at Target as of November 7, 2026. That is roughly $129 more than the 675's recorded price, for a newer, less-reviewed machine.

Today the iRobot Roomba 675 costs $124.99 less at its best price.

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