I kinda disagree that ayu has more emotion in her voice. I think hikki and ayu are about the same. It's just that most of ayu's work (esp her early works) were mostly about things around her, while hikki didn't really emphasize her life in her music. So maybe that is why you think ayu has more emotion in her voice.
I find out that many artists doing the same error. In the beginning their emotions were always great. When they tried to improve their vocal techniques, somehow they forgot that emotions are as important. They improved the techniques, but their newer songs were lacking emotions.
So I'm glad that hikki doesn't forget about emotions in the new songs

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Quote:
Originally Posted by kotora
Is she trying to be Adele now.. 
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Maybe Adele copied hikki

. Just joking lol.