The hellocosplay one only includes the Vest+Skirt. where the other includes the hair stuff and mic ribbon too. But if hellocosplay is the safer one, as it has been given good reviews so far, then I should prabably go with them.
Sugarlat: I thought they where different at first too. but if you look close, it is the same photo. The folds are in the excat same places. It's like they just used a photoshop thing and just twicked with the color layer thing a little.