I think this follows the definition of tech-trance.
For example, I was sure that this track is "a slow darkpsy", but then I found out it's more like Tech-Trance, tell me what you think..:
http://www.youtube.com/watch?v=BJP3ap1cNDo&list=PL96evuOzlW021mN7YlGLHA_k6RypuEcMc&index=1