It's reeeeeally a stretch to say they're all the same as who contributed to Walpurgis. The way I see it, Madoka's first shot was only for magical girls in the present time.
First has long zigzag-finish sleeves and random circle things on her head. Second looks like a giant afro with a crown, also has a scepter.
Third has an antenna of sorts, four hair loops and wings. Fourth has wing-like sidetails on her head. Fifth is apparently Miku. Sixth looks like her crotch is a giant bird's nest.
i'd like to know how you can tell these are the same girls