If you like [name_f]Josephine[/name_f] as much as [name_f]Josie[/name_f], I think I’d say [name_f]Josephine[/name_f]. I am not Josephine’s biggest fan, but I do like a name with options.
Personally, if I were picking between [name_f]Josie[/name_f] and [name_f]Josephine[/name_f], I would 100% do [name_f]Josie[/name_f] though. 