Place of residence in Berlin and car insurance: relevant savings factor or negligible?

I'm currently dealing with the ongoing costs of my eventual permanent move to Berlin. One of the costs is my car, which I will have owned for about a year at this point. When comparing calculations, not only the city, but also the specific Berlin postcode seems to have an influence on the insurance premium. That's why I'm wondering whether this is really financially relevant or whether factors such as SF class, annual kilometers, driver group and