nope. complex ptsd is DSM-based whereas desnos goes wider and has input from a field greater than psychiatric research (ie. psychologists, social workers) which makes for richer information gathering when whoever is conducting an assessment is taking on board what the person is saying and placing it in context with their experience, rather than just the bald symptoms of ptsd (complex or garden-variety)
this link
http://www.traumacenter.org/products...les/DESNOS.pdf gives some idea of where the thoughts came from when desnos was formulated (ironically, in a psychiatric journal!)
few in general psychiatry use it because its too comprehensive! but psychotraumatologists find it a helpful tool which enables far better treatment planning (and prognosis)