I think it boils down to hockey and football in North America … I’ve always said in the past it was the Stanley Cup in hockey, due to a six month regular season and two more months of high intensity postseason while Super Bowl teams have four months of postseason and 3-4 postseason games
Both sports have collisions galore, but certain players in hockey try to minimize heavy contact while in football the same can be said about QB’s, kickers and to some degree WR’s
Collins in hockey usually involve more force as an element of speed, while a lot of those scrimmage contacts are contests of strength, technique and leverage
Hockey also allows a lot of permissible use of the stick to whack the legs and torso of opponents and I’m not sure football has a permitted comp?
Hockey also has boards and NFL doesn’t (arena ball does though!)
In football’s corner, there are generally shorter pro careers unless you are in the protected class (see QB’s and kickers)
Persuasive to me for football is that in 95 or so years of official postseason playoff structures, only one team (Lombardi’s ‘65-‘66-‘67 Packers) have done a three-peat, and more extended runs (Lombardi 5 in 7, Noll 4 in 6, BB 6 in 20) have been broken up into pieces
In my lifetime there have been several NHL teams winning 4 Cups in a row (Habs twice/Islanders, plus Oilers 4 in 5) to string longer multiples
Having played both of these sports, I will say hockey is a harder game with higher upside risk to life and limb, but both sports saw an in-game fatality (Masterton late ‘60’s NHL, Hughes in ‘71 NFL) so sh!t happens
The accumulation of Stanley Cup games still leaves me in hockey’s corner, but by a slimmer margin than previously believed here … JMHO