The RoboVac 11S was part of a group of similar eufy models released around the same time
in 2018: the RoboVac 30 and 30C, 35C and 15C, all sharing the same
1,300–1,500 Pa suction range, and none of them having mapping or navigation. This
similarity is a major reason why searches like “11S vs 30C” and “11S vs
30” are among the most frequent for this model. They are more like siblings than
competitors, and in most pairs, the real difference isn’t cleaning performance, but
app support and dustbin size.
The real big difference is with eufy’s current lineup. Every active eufy model
sold today has a smartphone app. The 11S never did: it operates entirely with the remote
control included in the box and a single auto-clean button. This is more a sign of its age
than a flaw. Scheduling and no-go zones via the app weren’t as standard in budget
robot vacuums in 2018 as they are today.
In terms of suction power, the 11S’s 1,300 Pa is considerably below the
2,500 Pa offered by eufy’s current most basic active models, the G20 and G40
Plus, and a tiny fraction of the 20,000 Pa of the E25 and E28 Omni flagships. Both the
G20 and G40 Plus add mopping functionality, which the 11S lacks, and the G40 Plus also
includes a self-emptying station. Neither is a perfect replacement (eufy stopped producing
such a basic model a while ago), but the closest match in spirit is the G20: added app
support and mopping, no self-emptying station, and roughly double the suction power.