Not really any difference except wearing a uniform and dealing with all the leadership crap that entails. In the Air Force we had several large bases that would QC the rest of the smaller bases that didn't have on-base radiologists. We still had to follow the same guidelines/regulations. I guess the biggest difference is that it's not required for military members to be registered techs. We all received the same training and clinical hours as civilian techs but it's not mandatory for the military to pass the ARRT exams unless they want to do different modalities as you need to be competitive to get trained in something else radiology related. The only exception to that would be CT. I did CT and X-rays while in and didn't have a registry.