I'm sure that the PR article is "literally" right in some way that will be discovered soon (maybe number of compute cores they showed on screen, or GHz, or DirectX support). I'm also sure that AMD aren't maintaining multiple different versions of their GPU that differ in significant ways.
The consoles will be out in a couple of weeks, so we can put them side by side. My guess is they are going to as close to identical as we have ever seen two consoles...