Getting the pain pump should be last resort. Many people return due to infection and need the pump replaced, which creates more scar tissue and more risk for infection. Just my experience.
It really doesn't matter. They both cause nerve pain and neither are curable except if a cause and treatment is found like lyme or a herniated disk pushing on a nerve. Peripheral neuropathy is feet, legs hands, mostly felt in extremities. A radiculopathy can be in certain areas like lumbar, cervical etc...I guess the pain pump woud be a decision between you and your doctor. I'm sorry for your problems. It sounds horrible.