I find the wire ones twist on the line denting the clothes. That annoys me. The Pincinox ones don't do that and also grip better. I switched to them about 10 years ago and haven't bought pegs since.

I did do the evil thing of giving my mother and her sister "sample bags" of about 20 pegs. They both ended up buying more of them because having some good pegs is way more annoying than having all shitty ones.

https://pincinox.fr/en/our-product/