I always dispute the "toughness" of rugby players Vs American footy players, different tackling styles for one.
Many moons ago I played the American game to a high (in the UK) standard. I was roped into playing rugby one weekend for a mates team. Anyway, 10 minutes in, I executed a perfect block on one of the other teams wingers, (it was a moment of confusion as to which game I was playing
). I ended up in the sin bin, he ended up in casualty.
180 lb winger 0, 225 lb linebacker 1