You need work experience in both and decide for yourself. Everyone is different.
Job prospects in radiography are excellent and with government plans to scrap funding, will only get better. You'll probably be working in a short staffed department when you qualify but your job will never be at risk and you will be pushed into further training as soon as you've completed your preceptorship period in your first job. You'll most likely be band 6 within 2 years of qualifying.