On my main PC keyboard all the keys look exactly the same, though there are a few different sized keys (Das Keyboard FTW!)
They are all equally shiny.
At work, on my Dvorak IBM Model M ... they are equally shiny.
That said, the ink doesn't rub off on the Model M .... you can take a 20 year old dirty keyboard and clean it ... and it looks the same as it would have when it was brand new.