what is the difference between OSDD alters and DID alters?

i still am confused...and i guess i wouldn't 'technically' have a diagnosis of DID just because there is no taking over of my body (they don't live their own lives externally) but can influence things, try hard to come out at times when triggered/want to, and some have names, ages, and genders and their own specific ways of thinking, feeling, etc. that differ from each other (and me). there also aren't black outs (but time gets very distorted, and i forget things but not important things except from childhood, traumas and general things).

it all gets confusing. thankfully, my therapist doesn't treat me any different, but i still am confused because of all the wording. just when i think i understand things, i don't again.