I'm gonna hate asking this - because of who we're talking about - but are you suggesting the Chiefs don't win the SB w/o Sammy? And yes, he played very well in playoffs.
While I'm not in the "must have" Clowney camp, I believe his impact would be greater to the Bills D than Sammy was for the Chiefs. No, no, no Sammy apologists, I'm not knocking him. Just an opinion.
It's all about the impact a player brings. That's what the mindset ought to be, imo.