[Rawnrr]

A friend of mine described such questions as simply being where one decides to slice their bread.
Meaning that the distinctions we make in describing such experiences depend only on what we individually choose to include in our description.
Consciousness is not in actuality separate states of mind, it is continuous and undivided, yet for most people we cannot experience the wholeness of it all at once, and it also makes experiences hard to talk about unless we talk about the smaller pieces. For some the difference is as simple as having waking consciousness on one side and subconscious on the other. But for others it becomes important to break things into many smaller pieces so that the details can be expressed in a much clearer fashion.
Personally I like to make distinctions between lucid dream, astral travel and OBE. Where lucid dreams are where your consciousness experiences perceptions from within ones own psyche, and astral travel is where it gets beyond the personal experience. But there is alot of blending and bleed through between the levels.