Really what is the differnce

I am sitting here looking at the picture of the week and thinking yep I totally get it.
What is the difference between a person who believes in UFO's, Aliens, Alien Abductions and all things which revolve around this subjects and a person who believes in an 'all powerful being, who creates the entire universe in 6 days, sculptured man out of clay and ash and woman out of one of his ribs, has magical powers, is immortal, can influence your every aspect of each persons lives and take control of it'.
Neither of these two beliefs can be proven, all we have is faith that Aliens exist and a reasonable idea of the Universe and its vastness and a 1500 yr old book which says this is what happened by the way it was mostly written several hundred after the events in which it speaks not eye witness accounts as most believe.
So what is the difference apart from Jesus and any and all Prophets who came and told us so..... I know a guy around the corner who tells me all about the aliens and what they have said about life the Universe and everything so in a way he too is a prophet.
Tell the real difference because all I can see at the moment is two seperate belief systems one which is excepted and one which is ridiqueled.