Full-year tyres on the RR LG405

Moin municipality, so slowly it gets colder outside and the temperatures sink into the single-digit range. Time to think about changing tyres. Now I have the “problem” that my new RR is not delivered until mid-November and I drive a RR demonstration car from the dealer until then. This is equipped with all-year tires. Since I don’t trust this GJR (in my view nothing half and nothing whole), my RR gets missed classic seasonal tires; i.e. in winter Winter tires and summer summer tires. Now it can be that it snows in the beginning / middle of November, therefore the question, how the experiences of the RR(S) with GJR are on snow and ice. According to the LR marketing the RR(S) the GJR is completely enough to get everywhere…Terrain Response be thank you. Has someone already been on the road with GJR the whole winter and how are the experiences in winter road conditions? I don’t want to experience a bad awakening with the demonstrator.