We has summer/winter diesel for improved starting properties in winter. The diesel from pump is mixed with kerosene to reduce problem with wax in diesel filter in winter period.
My father in law in Ukraine told me there in Ukraine/Russia use 10% gasoline in diesel to reduce wax in filter and easier starting in strong winter.

No change with gasoline in out country (Norway) in summer/winter period. Depending on which crude oil was used to destillate the gasoline who need changed with other gasoline for winter in other country as you mentioned.. The crude oil from difference country such as in Mid-east, America, Russia, North-sea has not same stuff and properties..