The difference between companies is the person that leads you across the track
You wouldn't do a first aid course with someone that read about first aid in a book, you'd want a Paramedic, a Nurse or a Doctor - a medical professional.
Why do Kokoda with someone that read about soldiering and history from a book?
See Kokoda through the eyes of a soldier, with somone that has combat experience, has trained to be a soldier, studied tactics, strategy and someone that can help you see the history through the eyes of the diggers.
Anything less than this is not an emotional connection, it's an expensive bushwalk