People should not confuse symptom severity with classification. Classification, there is only PTSD. That's all that physically exists. That diagnosis then has a range of different symptoms. Some meet more than others, and they also meet them at greater severity than 7 out of 10.
Severity is usually graded, hence why you hear things from professionals such as Severe PTSD, Complex PTSD, etc.
They are not diagnoses, they are severity scales. One should then not confuse that with trauma type, ie. Combat PTSD, also which does not exist, its purely a term coined to quickly depict that the person is a veteran and got PTSD from combat.
As a diagnosis, there is only PTSD, and it should not be broken apart into classifications... that would be extremely detrimental to the overall doctrine that many physicians already struggle with so much, just having one diagnosis for PTSD.
It would be the mother of all f*ck ups if they ever did that.