What are these instances of PC versions getting distinct reviews in instances other than staggered releases?
http://www.metacritic.com/game/pc/battlefield-hardline
http://www.metacritic.com/game/pc/dark-souls-ii-scholar-of-the-first-sin
http://www.metacritic.com/game/pc/ori-and-the-blind-forest
Sure there's probably some review overlap of platforms, but PC gets specific reviews of games all the time.