The powers that be have still decided that it is one thing and added a dissociative sub category to address those with some of the things that usually additionally come up with early or repeated trauma.
As Meadosweet said they claim that the symptoms are the same - hypervigilence, flashbacks and intrusions, flight and flight issues, emotional numbing. The differences tend to come with things that are in the realm of what is thought of as the "complex" part of complex trauma and which is argued is not an actual part of PTSD itself.
Some of those things can happen from abuse and neglect that isn't necessarily trauma to an extent. Obviously the more extreme and earlier the trauma the more likely the damage would be worse. At different times in child development we develop different functions and an absence of what we need or the presence of a trauma do huge damage.
They are things like attachment problems, inability to learn any emotion moderation, trust and other related issues, interpersonal problems, social skill issues and many more. When these are severe enough at present there is a dual diagnoses of personality disorder and or a dissociative disorder as well as there commonly being such problems as eating disorders, OCD and addictions to self harm etc.
I know for myself the difference just something such as being better at moderating emotions can make. The flashback can be exactly the same but it felt hugely magnified before and so therefore so much worse. Now I can deal with it better and so even though it is the same thing it feels so different.
|All these deficits and terrible early wounds make it so much more difficult for someone with early trauma, neglect and dysfunction to heal and deal with therapy. The relationship with the t is complex and all the basics that someone needs to deal with something difficult - in this case PTSD - aren't there.
There are other things too of course. Like the research that Kas mentioned that may indicate that it is passed on to the next generation through epigenetics.