They only showed Ogata and Nonaka Miki's footage...between the two, Miki definitely is much better in both dance and singing. Her vocal is stronger as opposed to Ogata's small voice. Ogata seems so shy and not as confident, which I find quite surprising, considering all those pictures we saw of her doing weird faces lol Well, Maachan wasn't very confident as well when she auditioned and look how she is now
So I hope we get to see the other side of her soon as she blends in the group.
But man, I am overall impressed by Miki. I have a feeling she'll be pushed in the vocal department before too long. Once she learns to control her voice that is. But she seems quite good already from the start, unlike Haruna/Maachan.