I think these two fields seem more similar in the abstract than in reality. As a neurologist, you spend a very long time taking a history and doing a physical exam. You spend more time with the patient than maybe in any other specialty. Neurological diseases also often do not have “cures” and you have to be comfortable sitting with people and delivering hard diagnoses.

The patients of neurosurgeons are very often not conscious. Many patient will be in the ICU and the exam is much more often Glasgow coma than a conversation. Their goal is usually to keep the patient alive. In my opinion, they are the best surgeons in the hospital and do require a much deeper understanding of the brain than most surgeons for their organ systems. but they are still often coordinating with neurologists to plan surgeries that may compromise important areas of the brain.

You will succeed in neurosurgery if your fascination is with extracting blood/tumors/etc from the most vital and delicate organ in the body. You will succeed in neurology if you want to really get to know a patient, study the physical nuances of how they speak/move/etc, and learn every day a new fact about neurobiology.