Nicole as of now. Her vocals have seriously improved over the years and her technique is excellent as well as her tone. Leona is amazing but there seems to have been a decline since her debut. Like I said, both are great but Nicole is the better vocalist.
Leona at her peak was a force. For me, she was uncomparable. Nicole has grown so much and it looks like she has been taking care of her voice too. She is killing the game... She wins this one. However, Leona's first performance of Run will shatter in the next life too.
