What is the difference between NCT U and NCT 127?

Related questions

1. What is NCT 127 and NCT dream?
2. Is Lucas in NCT dream?
3. How old was NCT dream when they debuted?
4. What are Astro fans called?
5. What are the NCT units?
6. What NCT is Lucas in?
7. Is WayV still part of NCT?
8. Is Taiwan a part of China?
9. Is WayV part of NCT?
10. Is Mark Lee in NCT dream?

Tags

1. #which
2. #fixed
3. #rotational
4. #switch
5. #taeyong
6. #doyoung
7. #depending
8. #means
9. #alright
10. #johnny
11. #haechan
12. #unless
13. #members
14. #taeil
15. #permanent
16. #group
17. #winwin
18. #jaehyun