Hello student If you understand the difference, it would be easier for you to choose which one is better. Though I would say both are doing equally good in their respective field  As a Radiologist rather Radiographer, your main role is to conduct test on the human body with machines like X- rays, MRI, scans etc. You are the one a Radiographer or a doctor would refer patients to and after their test, you would generate the report and send it to the concerned doctor for diagnosis.In simple and layman language, a nurse is the one who assists the doctor during, before and after surgery, right from getting patients ready for the surgery, to administering drugs and injections to after care till discharge is handled by a nurse.
Now its completely your choice.
What role would you be interested in?
Hope this helps you making a choice
Good luck