According to my research, there is no technical difference between the two versions. It is the same device. The only difference is the scope of delivery and the default settings for the international version for several languages and regions, in short, you can use both, I would choose the cheaper one.

Hello,

the German and international editions of the FRITZ!Box 6850 5G only differ in terms of the scope of delivery (Quick Start Guide in German or multilingual). In terms of functionality, both editions are identical.

Our technical support team will be happy to answer any further questions you may have. Please send us a message to socialmedia@avm.de and mention the ticket ID "6546970" so that we can quickly allocate your enquiry.

Kind regards from Berlin
Your AVM team