They re both average vocalist with distinct tone in ive
Liz is stable soft vocalist but she isn't true perfomer on the stage...Now she improved as powerful singer in royal song also this is okay average vocal
Yujin's vocal is lourder than liz but she haven't great technique as liz(normal izone have self trained for vocal and dance)add she is one most charismatic performer.
Liz sing all the lines with great stability and yujin sing her lines with difficulties in stability in live performances (mr removed)
Yujin sing all the song in encore with liz is nervous in encore love dive