"I was at the buccs game last week..." So sorry to hear that.
Seriously, comparing the games/players is apples and oranges. The football guys are super tough and hit incredibly hard, but the rugby guys are also far tougher than the average Joe, but have far more stamina than football players. As mentioned, they are on the field for much more time. They are also constantly moving, where football is more of a series of sprints, with short breaks in between (and a fair amount of substitution).
I don't watch much rugby, but I can't recall seeing rugby players being given oxygen after making a major play (such as football players are commonly doing after running 20 yards).
Anyway, GO PATS!!!
Mike