I honestly see no difference in any of them. As an atheist who escaped the mainstream one of my family, I do find it fun when more mainstream ones get bent out about the not as mainstream ones. I would think they would band together but such does not appear to be human nature even with atheists.

I loved this in Catch 22 the first time I read it:
"What the hell are you getting so upset about?' he asked her bewilderedly in a tone of contrive amusement. 'I thought you didn't believe in God.'
I don't,' she sobbed, bursting violently into tears. 'But the God I don't believe in is a good God, a just God, a merciful God. He's not the mean and stupid God you make Him to be.'
Yossarian laughed and turned her arms loose. 'Let's have a little more religious freedom between us,' he proposed obligingly. 'You don't believe in the God you want to, and I won't believe in the God I want to . Is that a deal"