Both YUI and Erika Sawajiri (1 Litre of Tears) play Kaoru Amane in "Taiyou no Uta". YUI in the movie. Erika in the drama. Which song is better?

"Good-bye days" - http://www.youtube.com/watch?v=bhNdE0hZEUw
V.S.

"Taiyou no Uta" - http://www.youtube.com/watch?v=_pyZl-HDRng
---------------------
I vote for Erika! She's just simply amazing. I think her song is better than YUI's in many ways. (Her voice too. I like YUI's voice, but sometimes, it's just annoying... I don't know why...) The melody is so beautiful. I heard she wrote the song. I hope Erika will continue to sing because she's not only a great actress... she really can sing!