Being an advanced iRobot vacuum, the 770 model comes with several beneficial technologies, such as:
It is equipped with a full bin indicator, HEPA filter, being programmable and smart. The vacuum removes 98% of dust, dirt and pet hair from all floor types, following Persistent Pass cleaning pattern. On the other hand, comparing iRobot Roomba 770 vs 620, I would say that the basic model has virtually no benefits in terms of performance and features, but for the larger dustbin. It is equipped with Ni-MH battery that is longer to recharge, but safe and more long-lasting in operation.
Having the similar round shape, the popular Roomba vacuums still have some differences in terms of design. The advanced, 770 model is more lightweight and low-profile. It is black, being minimalist and elegant. Meanwhile, some users think that the 620 model’s casing is more hard-wearing, as it’s not sleek.
Considering Roomba 620 vs Roomba 770, we see that the basic, 620 model is more affordable, and the difference in price is very significant. Therefore, it has a bit higher rating, while both vacuums are bestsellers.
Being one of the least intelligent and the most affordable iRobot vacuums, the 620 model comes only with several basic features, including:
It doesn’t fall off the stairs, but the vacuum is definitely weak in navigation. It has poor cleaning abilities, being a bit noisy and not too powerful. Quite naturally, the vacuum is not the most efficient on carpets and rugs, but it is still designed for all floor surface types. Therefore, I would recommend the model for beginners and large house owners.
Coming with a number of innovative technologies, the vacuum is extremely efficient, smart and performant. It eliminates dirt, dust, pet hair and cat litter spots perfectly well, from all floor types. The model is lightweight, low-profile, easy to maintain, but very expensive. So, paralleling Roomba 620 vs 770, and selecting one of the vacuums, I would take into account the family budget, the house size and the cleaning needs, that is, the necessity of air filtration, spots elimination, etc.