Riddle of the Day

Okay so again I am having trouble deciding on which one member I like the most..........
So again I will post hints about two members of the same group and let you figure out who is who and which hint belongs to that member.

So,...............

     both of them have started in several t.v dramas and films.
One of them was the star of a drama (recent or not) that was basically a musical.
       The other was more of a supporting cast in several dramas but did have a lead role in a comedy.
One was a solo act before joining the group.
        The other was apart of another group that just stopped being a group.
One had his name changed in the 6th grade.
        The other had some controversies over his stage name since it was technically the same as someone elses but with different meanings.
One has appeared on several other artists mv's and/or tracks.
        The other is well known as an occasional rapper but mainly singer, dancer, and actor.

Figure it out!!!!