A second map is not a second dock
Using one robot on several levels is an ownership workflow, not simply a map-count specification. Someone must move the robot, the machine needs a usable map or documented routine for the level, and wet cleaning may require a return to the station. Neither robot in this comparison is presented as able to transport itself up stairs.
The selected US models are eufy Omni C28 T211A110 and Shark PowerDetect UV Reveal RV3020XE. The research supports a useful question about multi-level cleaning but does not establish a widely observed exact A/B buying pattern, so this is an exploratory comparison. The Shark US model's multi-floor behavior remains unconfirmed.
For an owner willing to carry the robot between levels
Consider C28 when the documented eufy family workflow matches what you are willing to do. Eufy's support article describes storage of up to five maps and cleaning a level without the station. The article is hosted on the Canadian support site and concerns the C28 family; verify that the selected US unit and current app provide the required behavior before relying on it. Eufy's multi-floor instructions
Trace an actual run. Move the robot to the level, select or establish the appropriate documented setup, clean the area and handle the return. According to the support description, a robot cleaning away from its base returns to the starting position rather than somehow docking on another floor.
That can be workable for someone who already plans to carry it. It is not equivalent to all floors being cleaned automatically while the owner does nothing. Decide who will perform the movement and whether that task is acceptable before choosing one machine for the entire house.
For a second floor that also needs mopping
Include the station visits in the plan. Eufy's documentation says the owner may need to carry the robot to the base and back for mop care during longer intervals, as well as return it after the run. A saved map does not supply clean water, a wash or another dock on the upper level. Secondary-floor care requirements
Consider whether the repeated carrying interrupts the convenience you want. A household mainly needing dry pickup on the other level has a different task from one expecting a long wet-cleaning run there. Evaluate the actual floor area and routine rather than selecting solely from the maximum number of maps.
If the requirement is unattended multi-level cleaning with no movement by the owner, this comparison has not established that either package provides it. Keeping the current arrangement or investigating a separately docked device for another level may be a more relevant next step; no additional-device price comparison is supplied here.
For a Shark that will remain on one primary floor
Consider the exact RV3020XE when its documented US configuration fits a single-level job and you have verified the cleaning and maintenance routine you need. In that scenario, the unresolved multi-map question may not determine the purchase. Shark's US model page
Do not extend that conclusion to a multi-floor plan. The US sources reviewed here did not confirm map capacity, floor selection, relocalization or map-overwrite behavior for RV3020XE. Those remain unanswered requirements if you intend to carry this robot between levels.
Independent reviewers of PowerDetect UV Reveal reported a one-map limitation in the units or app versions they used. Their exact regional hardware was not established as the selected US model, so we do not convert those observations into a definite US incompatibility claim. TechRadar's review · Ideal Home's review
For a buyer who needs a definite multi-floor answer
Hold the purchase if it depends on an unverified capability. Ask the manufacturer about the exact US model and current app, including whether maps are retained, how the second floor is selected and what happens when the base is absent. A clear model-specific answer is more useful than assuming a review of a similarly named product settles it.
For C28, verify the documented family procedure against the selected unit. For Shark, obtain confirmation of the missing US behavior. Neither a generic mapping feature nor an automated dock demonstrates the complete floor-to-floor routine.
Keep a working vacuum if the proposed replacement still leaves the repeated task unresolved. The useful decision is whether the combination of maps, carrying and station care fits your home—not whether a product page makes the robot sound capable of cleaning several floors without human involvement.