I like the Orzly case, but as you can see in the picture on the right corner of the watch screen, I always get those spots. And they aren't always on the same spot, it differs (yesterday, it was on the right upper corner and the day before in the centre of the screen).
I have to add that I use the Skinomi screen protector underneath the Orzly case, because I didn't plan to use the case all the time, so maybe that's the reason for the spots.
So I'm going to use the case for days where I expect casualties (like hiking, biking, ...) but for normal use, I'll just stay with the Skinomi.