I thought you heard her new album?! 🤔
Yes, she's a more well-rounded Idol than Yuri, and she stays in her line as well. If you watch real live performances from them, you can hear, both of them are airy, but Chaeyeon has more stamina, and even tho Yuri has a bit wider range, she can't support the harder notes that much.
I chose two similar ballads from them, it's easy to hear the difference. To be honest, it's all about their skills. Yuri could be better over time, but right now, Chaeyeon is effortless with fewer flaws. Also, I think Yuri picked a wrong company too. Chaeyeon is at label under RBW, and they're focusing more on the vocal training and it shows.
Chaeyeon LIVE:
Yuri's "Taeyeon - FINE" cover is the prime example of what she can and can't do. The next cover in this video is much better.