Who is more popular, Kim TaeYeon or iu?

This question is not easy to answer, because you said that anyone, another person's fans will spray.

Personally, I feel that I first came into contact with IU, but I have no feeling about IU, almost a passerby.

Later, I came into contact with Tae-yeon through IU, and I became a fan from Tae-yeon's "I". You can listen to the high notes at the beginning of Tae-yeon's "I", which is really shocking, and some new albums later are really amazing.

Personally, I think Tae-yeon is more popular because I have more contact with Tae-yeon.