As a group, I would put Aespa up there as one of SM's most vocally well-rounded groups.
As individuals, Karina and Winter are much better than other lead and sub vocals in SM but Ningning is probably the worst main vocal in SM
Compared to their other girl groups:
Main vocals:
Luna > Taeyeon > Wendy >> Ningning
Lead Vocals
Winter > Seulgi > Seohyun > Tiffany > Krystal
Sub-Vocals (leaving out SNSD and f(x) there's too many to rank)
Joy = Karina > Giselle > Irene > Yeri
Overall:
Red Velvet = Aespa > SNSD > f(x)
Re-watching the performance, Ningning was really good at certain points during Coachella but also pitchy and unstable during other parts. They were on stage for all of 12 minutes so that's not really a good indication of her stamina. I would have put Aespa over RV because Giselle and Karina are better than Irene/Yeri but I think the gap between Wendy and Ningning puts them at equal positions actually
Thoughts?