I have noticed a couple of hairline scratches on my new Series 3. Very faint, but they are there. I haven’t put the watch done on any surfaces, and am even super careful when I charge it, placing the inductive charger on slowly so it doesn’t smash against the back. I have noticed that the LTE versions have a ceramic back. Although I cannot use LTE, would it be better to spend that little bit extra for the ceramic back?