One nation under God and One nation under the leader has no discernable difference. I could even say Communism is the revenge against the Gentiles for crumbling the Millennium Kingdom of Europe, because the principles of Communist Governments like Stalin and Mao and the Vatican since the fall of Rome, is one and the same.

Oh and there's a trend between these systems, and that's the elites go richer and everyone else starve to death. It's of no coincidence that no matter how awful the UK, USA or modern Russia is, they don't anywhere near Dark Ages Europe (pious under the Semitic God) and Stalin, Mao or the Khmer Rouge (pious under the leader).