Hello @hansmaulwurf Welcome to the community. As per my knowledge If you are deciding between the Raspberry Pi 4 and the Raspberry Pi 5
Here are a few points to consider
Performance
Availability
Budget and Requirements
If you need a Raspberry Pi immediately or have a timesensitive project; the Raspberry Pi 4 is a great choice. if you can wait and want the latest features, the Raspberry Pi 5 is worth it. It offers better performance