The EOD and the NYC La Boutique RO chrono, were based on an older PVD process and materials. (Sidebar - PVD is a coating process, which bonds various coatings of differing materials to a given substrate)
The Survivor uses DLC (diamond like carbon/coating) on Ti; the process and coating material have proven much more wear resistent, with much better bonding characteristics, than those earlier PVD examples.
"A Purist does not believe in gilt by association. Respect, AND disdain, have to be earned..."