happiholic★, that's how I see it as well.
I just can tell for sure for Edge Style, cause I'm reading that regularly. Ayu even is often before Kuu in those polls there, so I don't know if saying she's sporting the younger Gyaru crowd is right... Ayu has the Diva image as well as Kuu.
Though Kuu has a different appeal and compared to Ayu Kuu wears the gyaru style also privately. While Ayu prefers not wearing make up, having her hair just simple and short and wearing rock influenced and simpler clothes most of the time. At least on her self posted twitter photos and so on.
I've read in some comments in the net about the Kuu lenses that people want a nail line. I'm so for it! Something I'd use myself.
That's also something I expect to see from her and not lenses.
