MARSOC is not SF. The term you're looking for is SOF (Special Operations Forces). SF stands for Special Forces (aka Green Berets). Furthermore, you cannot compare one SOF element to another. They have different purposes. Source: Just served four years in the 10th Special Forces Group (Airborne) Any other vets want to play, feel free to add me. Name is same as on here. I play with a couple of Marine buddy's.