I agree here, again, as I point out a handful of posts above, the average football hit is going to be more solid and happen more frequently than open ice hockey hits. The numbers and tool above are useful for comparing best case scenario hits, however. It's mostly to counter the arguments that the hardest (reasonably clean) hockey hits aren't as hard as the hardest (reasonably clean) football hits based on 'but football players are much larger!'. That's simply a poor understanding of the physics involved.
One thing worth noting is if you watch a highlight reel of the hardest 'clean' hits in the NHL vs hardest 'clean' hits in the NFL, a lot more of the NFL guys get up and walk away from it. NHL guys subjected to a solid open ice hit usually have their day (week/month/season) wrecked.
Hockey players are still tougher than just about anyone else. Ryan Malone takes a slap shot off the nose, he's back the next period. A baseball player hurts his finger, he's out for a month.