In my opinion the two sports can't be compared. There is a huge technical difference so how can you compare how players react on the pitch? In football nowadays any clattering (or even contact at all in some cases) will be met with a 'ooooh' from the crowd, in rugby, that's the whole aim of the game!
And let's be fair, the rugby lads all love to dive in as a team and give one person a good kicking don't they? Just because you've got a head the size of a Nissan Micra still doesn't mean you're playing a 'real mans game', you're just a fat f****r.