Both artists work in interesting strategies. Hikki really releases stuff in every blue moon ahhah it's been ages since she released COLORS and we haven't even heard what will be her next release. By doing that Hikki doesn't overexpose herself too much though. Also it makes people appreciate more the fewer stuff she released compared to Ayu's war arsenal of releases. Hikki's songs doesn't really appeal very much at first to me. I didn't like more than half of the songs in her Deep River album. By listening to her stuff more and more I start to get into it and enjoy them very much. I like almost all the songs from Deep river now. It also happens to me that it's more difficult to get tired of a Hikki's song because they're often quite calm and do not abuse the drum and guitar sounds and her voice always sound beautiful and well worked. Ayu by the other way releases lot of stuff and her songs are fantastic even when you're listening to them for the first time. There's so much stuff released from her that is quite difficult to appreciate everything properly so you'll most likely have to choose some favorites even though almost everything she does is good. She also overexpose herself too much, which is positive and negative. She is able to get many fans by that but she also gets tons of bashers and stuff. Also ayu made her fans addicted in quick releases and REMIXES. We hardly get to enjoy a new album from her and we already want a new single, and we don't even get to enjoy her original stuff expecting for new remixes and all LOL A fan of Ayu who loves to collect her stuff also suffers a lot because that person has to spend a lot of money on her LOL