I've had enough brushes, dreams and actual intervention with Guides, Angels and "Visitors" enough to know the differences, just in their energies alone.
For instance a guide doesn't have the same feeling as an Angel. One is more intellectual vs the infinity, divinity and calm, all being pure radiating love and unity of the other. A spiritual teacher isn't going to feel anything like a loved one, unless they happen to have been a minister as well.
There are Angels walking around on this planet everyday. These people are sent to interact with us on a more physical level.
A World of Earth Angels