Better Dancer: BoA, by far

Better Vocalist: BoA has a bigger vocal range, but I prefer Hyori's voice.
Better Performer: Lee Hyori, she always makes great concepts for live performances. You should check her out before saying BoA wins everything

Better Discography: Can't choose since I never heard BoA's korean discography fully.
Better Looks: Lee Hyori by far.
WINNER: Obviously my #1 artist, on last.fm, 이효리, a.k.a Lee Hyori.