I have grey/black and linen/black.
My grey ones are 4 years old this summer and linen ones maybe 2 years old. Both are in good condition, despite me wearing them religiously throughout summer and (dry) autumn weather! I’ve even walked around Parc Guell in Barcelona in the linen ones and didn’t damage or dirty them surprisingly (it’s super dusty and uneven terrain there).
My linen are slightly more comfortable, I think the jute (the rope bit) is slightly thinner on them and overall the fit is just better on me. But grey ones are still very comfortable.
I know some people have said the rope bit can have some fraying but I’ve never had an issue with that.
I can’t compare as I haven’t got the YSL ones though.
This is a recent picture of both pairs, as you can see, they don’t look too worn or beat up. I’m happy with the quality.
View attachment 4739822
Wow yours have held up so well! Thank you so much for your help! But I'm actually looking at the lambskin ones I should've been more specific ♀️