To tell the truth PTSD and CPTSD are two different things.
In PTSD there are one o more single traumas.
In CPTSD there is a period of life in which the subject has been exposed to an ininterrupted series of traumas, there is a situation of trauma that has lasted for many years, like an abuse childhood story, like captivity, like a long period in war in hard conditions, like living in war for many years..
With just common sense you understand that these two are different situations.
When trauma is intense and prolonged for many years, what you observe is a modification of the brain structure, in addition to a structural modification of psyche.
So it is so onvious that, as they are two different situations, the treatment has to be different.
I ask permission to post one o more links to the neurological explanation I have found.
It has also been scientifically (bio-chemically) proved that CPTSD (not PTSD) is one of the causes of Myalgic Encephalomyelitis. And also that the neurological mechanism that activates the symptoms of both illnesses is the same, I mean the fight-fight mechanism.