i feel like what's so interesting abt phantom singer (and superband, since it's by the same team and in the same format in a different musical genre) is how they judge the contestants? they pay a lot of attention to how contestants work together in teams and contribute to the act
they actually get dinged by the judges if they act too much like a soloist and dont listen to the other members, and even if they have great technique if it doesn't work for the song/performance they'll get that pointed out, and the judging is VERY harsh in how detailed they get
or like the judges will suddenly start coaching, like "try that measure again while following my conducting" or "instead of bel canto there try falsetto instead" and it's soooo detailed
the first round is especially tough bc it's a 1vs1 round, but they sing as a duet and they both have to show they can support another fellow performer while at the same time showing off what they're capable of, it's really demanding