In Switzerland, we do not have the i-Spin Safe in our range.
However, it largely corresponds to our i-Spin 360, which also has a four-star rating. Compared to the i-Spin 360, the i-Spin Safe has additional reinforced side impact protection, but can only be used rearward facing, whereas the i-Spin 360 can also be used forward facing.
We have made a small explanatory video here, which goes into the question in more detail: https://www.youtube.com/watch

Kind regards, your Joie Baby Switzerland Team