Are Thrillers Different in Different Countries

Is Scandi-noir a "thing." Are Scandinavian thrillers always darker than others. And American ones more sarcastic. And... Or is a book just a book, defining its own genre and resting in the shelter of someone else's label on the shelf? Two of the thrillers I recently read were Scandinavian, and they were definitely dark. Three American thrillers definitely had that gently sarcastic voice. And all four were blended with social commentary. Intriguing... Anyway, here are some reviews. Pick your...