well I can't say I believe in OBEs or not because they seem kinda starnge to me for that to happen but there is also evidence for it to be real. Ive read about a guy who would have an OBE whenever he was being tortured for some reason. One time it happened he was able to see somthing that was happening somewhere else at the same time and when he reported it it turned out to be something that really happened. Some people are said to be able to leave their bodies and retrieve information and then go back to there bodies and that wouldnt be able to be done in a dream. My grandma told me that my grandpa told her about him having an OBE in the middle of a poker game while awake.

Dreams are much less stable than any reports of OBEs.