Some questions about spine surgery career, neuro vs. ortho?

Is "spine surgery" a specialization after orthopaedics or neurosurgery residency that requires additional fellowship training? What is the difference in the scope of work of an orthopedic spine surgeon versus that of a neurologically trained spine surgeon? One neurosurgeon I spoke with over the phone said he trusted a neurosurgeon in a spine surgery operation more than an orthopaedist. When I meet orthopaedic spine surgeons though, they seem really up to date in the literature for new treatment techniques, devices, and patient care. I am kind of moving towards a stereotyping rant here, but it's interesting I have noticed many, not just one or two, neurosurgeons who are ultra compassionate in bed side manor, versus a lot of the orthopaedic guys I meet who have a bit of a tough, abrasive personality. This could all be based on who I meet though, and maybe they had military training that made them that way. Is the career interchangeable much like a foot surgeon with orthopaedic training versus a foot surgeon with podiatric training, or a hand surgeon with a background in orthopaedic versus plastic? The reason I really don't want to google the question, is because I might get a better idea of the careers from somebody first hand in the medical field.