I had a similar conversation with Frank Ontario. He distinguishes between higher/highest self and soul. I do not. I see no practical reason to. Guides are definitely different but I understand why you may not distinguish. I firmly believe that each of us and our souls are assigned at least one spirit guide to aid us while incarnated. Sometimes guides replace each other as some may be assigned to help at different times in our lives. I am blessed with 5 guides, https://medium.com/illumination/i-speak-to-god-and-god-speaks-to-me-23bff8ec2274 which also shows how difficult a lesson plan/soul contract/improv script I and my soul family/pod/fellow travelers wrote for this incarnation. And I'm doubly blessed that now I have 5+ as when my dearly departed Lindsey (soul name Sitara) finished her life review, she asked God if she could join my team and God said yes if I was ok with it and I whole heartedly said, YES!!!!!!
I don't know if you've picked up on that my soul's name is Marcus. My human name is Gregory.