The iPhone X uses polished stainless steel rather than anodised aluminium, and having owned a Stainless Steel Apple Watch, you are going to have to get used to seeing micro scratches, lots of micro scratches. Polished stainless steel shows these really easily. However, I have frequently used a ‘cape cod cloth’ to polish the casing of my watch to look brand new. This will only be possible on the White iPhone X. The stainless steel on the Space Grey iPhone X has a coating on it giving it its colour. If the coating technique they have used isn’t very scratch resistant (I don’t think it will be the same as the Space Black Apple Watch), expect to see the silver colour underneath coming through fairly quickly. Probably not worth putting too much thought into but it’s worth knowing.