Why spend time to discuss something not well defined?
The first link that I clicked while googling:
Subconscious vs. unconscious
Subconscious and unconscious are synonyms when they’re informal adjectives meaning occurring in the absence of awareness or thought. For example, to say that kittens make you feel anxious on a subconscious level is the same as saying they make you feel anxious on an unconscious level. But unconscious is the more scientific term, and it’s the usual choice in science and medicine. Subconscious is fairly common in quasi-scientific writing, but its definition is fuzzy, and it often signals that the writer lacks real expertise.
Quote from: http://grammarist.com/usage/subconscious-unconscious/