Cleaning
There are two basic reasons why wall-mounted toilets are easier to clean. For instance, their elevated standing prevents them from being in touch with the floor, allowing their underneath to be easily cleaned. Additionally, because the tank is hidden behind the wall and just the bowl needs to be cleaned, there are less gaps and corners where dust and filth can accumulate.
Floor-mounted toilets, on the other hand, have a larger surface area that must be cleaned, and classic two-piece designs frequently include tiny gaps where dirt and grime can accumulate, such as the space between the tank and bowl.