Eeeeeeeeh... She is really pretty but I gotta stay true to my bias. So I say Sana is better, No hate of course.
She's pretty but when you have Irene against you it's hard to be considered as the most beautiful woman in kpop sorry not sorry
Nayeon is one of the most beautiful not just kpop, but in the world - and that despite her ugly raised nose bridge. It's strange, she made her nose ugly with plastic surgery but she still manages to have one of the most beautiful faces.
I think Nayeon is one of the all around best idols, she has amazing variety skills, she's super charismatic, she can dance super well (she should be in dance line tbh) her voice is beautiful and sassy sounding (it sounds really different tbh, the technique she uses) She's also beautiful of course, I think she just has everything you'd need to survive as an idol, and that's the true tea sis.