Well, one is real and one isn’t.
I’m not particularly religious... or maybe more accurately, I have some serious philosophical issues with Christianity and I could be considered to be “in between” belief systems at the moment, but I spent my teenage years living on indian reservation and can tell you many, if not most, members of the tribe, myself included, have seen demons in our homes. I half jokingly tell my friends that I have my doubts about God (I’m a theist, but not an active particpant in any particular religion), but I have no doubt about the existence of evil or demons, because I’ve looked one in the eye.