Actually I think we would be less advanced. Had Germany won, Korolev dies forgotten, or perhaps killed by SS men who didn't freeze to death.
Germany holds onto Europe, defeats the UK and invades it, and demolishes their war fighting capability.
Von Braun is then kicked to the curb, with the Nazi war machine focused on 'more important' things.
For the UFO crowd, maybe the Nordic Venusians came from a different alternate universe, and were trying to make up for past ills.