As Gursikh bhai says.
Namdhari are the only real sect of Sikhs in that list. They are quite small in number. Almost overwhelmingly, Sikhs are Sehajdhari or Khālsā. Some use the term "Keshdhari" to refer to those who keep kesh and usually the five five Ks. This term is okay in casual conversation in my opinion, but it's not a term that the Gurūs would have known.
Ravidassias are a difficult group to confine. Some are pretty Sikh in mannerisms and personality. Others dislike being called as Sikh. I visited a Ravidassia place of worship once who considered themselves different from Sikhs. The differences were minimal. I think the only difference was that the reciter did not care for the text with the same love Sikhs do, and they had a picture of Ravidass up with a garland of flowers in front of him and I was not given "karah parshad" (a sweet, sticky pudding given out as a blessing and sign of hospitality). That was all I remember that was different.
Unfortunately, I did not feel as welcome in the Ravidassia place of worship as I do within the gurdwārā. I don't think they had ever had many, if any, white people enter into their place of worship before, so maybe it was just shock.