This song is catchier so it's automatically more likable because it sticks in your head... But the vocals in the other group were more stable. I think that's what he judged them on. In this performance Chaeyong, Natty, and Somi were the only ones that were stable! Minyoungs voice cracked. Sana and Mina weren't very stable and restricted their voice from fully coming out.... I think we'll be able to better compare with the other song since it will be the same song.