Could someone point to a reference that PVD somehow strengthens or protects. All the Apple website says is that its a colouring technique and NO mention of it providing any additional resilience.
As others have said, even if PVD does provide some protection, it is unlikely to be as tough as DLC on the watches and if it does scratch will be silver underneath. Micro abrasions will polish out easily from the pure stainless steel silver with a cape cod cloth. Really tough to choose as neither are great for those pedantic about their phones......
First off, physical vapor deposition or PVD, does not nearly have the strength that diamond like carbon coating or DLC does. PVD simply a
method that is used to apply a film or protective layer over a material to help strengthen and protect against corrosion and scratching. PVD is most common of a process to be used on firearms For protection. I don't think it's necessarily Apples goal to discuss in detail about what PVD is on their website, given that one could research exactly what it is.
https://en.m.wikipedia.org/wiki/Physical_vapor_deposition
http://www.semicore.com/what-is-pvd-coating
Direct quote from article:
"PVD produces coatings with superior hardness, durability and resistance to wear. PVD Coatings reduce friction for high performance moving parts making them widely used in the aerospace and automotive industry, and for cutting tools where long lasting durability is the crucial success factor."
The diamond like carbon coating used on the Apple Watch space black is more of a protective paint and is extremely durable. When Apple actually did advertise the DLC used on the Apple Watch black stainless at one point, they never actually physically talked about how durable it was either. However, Apple no longer mentions the use of DLC on the space black Apple Watch anymore on the website, although they still do use it.