Wait how long how you been using the one on your 15? I have the same case, used it on my iPhone 13 for almost four years but mine turned dark brown very fast in just a few months (I have naturally greasy hands so it sped it up I guess) now its very dark brown😅
I most say this the Skiin More is the best quality leather case I have had along with now not existing Nodus brands cases. The craftsmanship, the buttons and the quality of the leather and the awesome veg tanned leather smell the first months.
As said used my Wiiuka for several years daily and these last year dropped my phone several times on asphalt etc and these last case protected the phone very well.
I was soo gonna buy several Wiiukas this time around with their never models too, with my upgrade to pro 17 alas they went with covered plateau😭 So sad about that, but they said they plan on releasing plateau open models next year. I really hope so!