What is the difference between the Sirona S and the Sirona Z?

The two reboarders look very similar and also have similar features. The main difference is the base to the child seats. The Sirona S has an integrated base and cannot be detached from it. This means that you do not have to buy a separate base. However, it is a little less practical if you want to use the child seat alternately in two cars, as the child seat with base is rather unwieldy. If this is not a problem for you, the Sirona S is a good solution for you. The Sirona Z, on the other hand, does not come with its own base. This must be purchased separately. However, the base can also be used with the Cloud Z infant car seat, which can be useful if you have more children in the family.