What type of arthritis? From what I have read and been told, the main difference is that arthritis is inflammatory and thus can be progressive if it is not cared for. The pain and physical inconveniences of the arthritis should be more treatable as well.
Just a comment on the other topic in this post....
I think the main trouble with a 'dead bone' would be a matter of strength. The marrow provides a certain amount of support and flexibility to a bone. But while the marrow of the hip bones does produce a lot of the body's blood, it probably wouldn't be life threatening to lose that amount of production.
Just my thoughts. I refer all readers to the medical disclaimer on the site, of course. I'm not a medical professional.