No, none at all. All are but different names for the same process. I prefer the name "mental imagery" to "guided imagery" because you do not need another human being to guide you through the process.
Although I initially provide imagery exercises, as you become proficient in this simple and powerful technique, spontaneous imagery will arise from within you. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.