We have to agree about the wardrobe. At home is where we will dress according to who is out (but not always, it depends on our comfort in what the body is wearing at the time).
Some of us do have slight differences in our voices. My T can always tell when I, Darren, Jess or Alexa (one of the littles) is out.
I guess it's different for everyone. No two people with DID are the same.