Question: what is the difference between nct u and nct 127 and nct dream?
Answer: NCT U is a rotational unit as none of the members are permanent. ... Alright now, NCT 127 is a fixed group (for now, unless SM adds members). NCT 127 has 9 members; Mark, Taeyong, Winwin, Jaehyun, Johnny, Taeil, Doyoung, Yuta and Haechan.