Behavioural Neurology vs Clinical Neuropsychology

Hey guys, I'm having trouble deciding which career path I should go down. I'm having trouble distinguishing between Neuropsychology and Behavioural Neurology. I want a job that allows me to study the structure of the brain and its effect on behaviour and cognition, But with also a clinical aspect to it. Both fields seem very similar, so what are the major key differences between two people who work in this field? How different are the pathways towards these jobs? Can I become a Neuropsychologist without a psychology degree or with an intercalation in psychology?