The SEBO G4 and G5 models are very similar in cleaning ability- however there is one difference- the G5 has a 15" cleaning path and the G4 has a standard 12" cleaning path.
These machines will both clean the same. The beauty of the SEBO uprights is their uprights will clean all hard flooring without debris spitting back at you or around your flooring without the need for a separate hard flooring attachment. You are able to add one- but we suggest you try the machines as is, as they are excellent! There is a manual 4 height brush roll setting on the bottom of the machine that will allow you to clean even thick pile carpeting. So this machine is ideal for mixed flooring.
The reason for the different body style doesn't mean you are compromising on cleaning ability- you are just choosing between different luxury features with the other X series uprights. This machine does not have a headlight - and for some users this is not necessary. This machine is also very minimal and is very simple and easy to use.
Paired with SEBO's easy to clean / change brush roll change has always set the SEBO brand apart- as being able to clean your brush roll easily, helps not only prolong the life of your brush roll, but means less brush roll changes, better cleaning, and saves you money.