Both songs are fun, but still feel pretty Berryz-niche to me. I'm not sure what everyone else is hearing in Ai wa Itsumo that is such a revelation. So far, the previous single has seemed stronger to me.
I love Berryz so much, but this is literally the best they have ever sounded as a group. And one of their most outstanding singles as far as the previews go.
Ai wa Itsumo Kimi no Naka ni sounds kind of like a battle song, like Otakebi Boy WAO!. I really like it because of how epic it sounds. It has a unique sound to it in terms of H!P songs.