Studio, because it sounds a lot cleaner. At the beginning of the z100 version, she sounds a bit shaky...I'm sure after she's performed it a few times, it'll sound better. I remember the first time I saw VC perform ATM live on tv, it was very rough, but everytime I saw her perform it again it sounded better each time. ATM sounded the best I've ever heard it on the z100 recording for example.