I have the 44mm Watch SE and after 2 weeks, there were a few small scratches visible, which is why I quickly ordered the Spigen protectors. The Spigen is not showing any scratches after a further 2 weeks of use.
I had only worn mine under a pullover or with my winter jacket. I hadn’t scraped it against anything. It was just wearing it under clothing and in bed…
That said, I was shocked, when I saw my wife’s. She said again, that she hadn’t scraped it against anything and that it was always under a sleeve.