I am sure I will catch some hell for this comment, but it is from the mouths of babes (AKA anesthesiologists, who track blood loss during a case) about the subject:
Neurosurgeons usually cause (at our institiution at least) about 1/3 of the blood loss during a typical fusion, from a liter (ortho) to a third of a liter (neurosurg) on average, usually worse when an ortho attending is doing the procedure. Other than that, most reputable studies on outcomes from spine journals cannot find much of a difference in outcomes.
By the way, Vukken99, I know of no neurosurgeon scared of bone. What do you think the grey matter is encased in??? Conversely, I don't believe any ortho guy who goes into spine has a stiffling fear of screwing up the nervous system. I bet they've seen those long, stretchy things before, perhaps somewhere around the joints. Bottom line is, I foresee learning from each other, hopefully limiting the number of people walking around with hardware overall. Cheers...