Although I don't see a concrete difference between "old ayu" and "new ayu," I do see a change in her lyrics and maturity. I noticed that she has a lot more maturity in not only her voice, but also in her lyrics. Since her debut, she's been through sooooo much. That has caused her to mature as well; to grow with more life experience. I think that Ayu today is different than Ayu when she debuted for that reason.
