Answer:
A sociopath is someone who doesn't care about other people's feelings.
A deviant sociopath isn't in any psychology text that I can find. But here are some things that you might be referring to:
A sociopath who is abnormal in some way. This would be any sociopath who doesn't fit the exact definition of a sociopath.
If a deviant sociopath is just your name for a sociopath. See top.
An unpredictable sociopath. A sociopath who is unpredictable in some way, beyond a sociopath's normal unpredictability.