I'm not a expert by any means but I've experienced both and if you want to experience them you can find tons of information about both on the Internet and if you want to truly learn more about yourself it's a great way to get in touch with your higher self, I'm still trying to communicate with my spirit guides and it's been extremely difficult but I won't quit until I succeed.
Rob be careful particularly about the source of the power that drives your astral projection operations.
There are two powers that can enable you to astral project or bilocate namely:
The Holy Spirit of Jesus Christ and satanic spirits (demons). The later can be dangerous when you go deeper as may find yourself doing some wickedness you never taught you could do. Just an advice.
Alternatively, The Holy Spirit of Jesus Christ enables saints to astral project or bilocate or even have lucid dreams or other spiritual experiences as He wills not as Man wills.
Further, as a very spiritual person, I have had these experiences often and still have them,but they are engineered by the Spirit of Jesus Christ(Holy Spirit)
You can seek Jesus Christ and when His Spirit comes upon you, you will manifest spiritual gifts.
Demons can drive people crazy!!