At the amateur level rugby appears to be played much faster at least from what I've seen. Even Super Rugby is faster then test level and light years faster then northern rugby. In terms of ball recycle speed.I tend to find that the breakdown or ruck in both games tend to take similar time to be cleared on average. There are exceptions to that rule in Rugby but the difference is that where at the tackle play stops in League, it only introduces a new element in Rugby.
However, when a Rugby game is played at pace, as it often is in Super Rugby. The tackle in Rugby is much quicker. I tend to think the whole speed of play and fitness element is much over hyped in League. As a forward and having played both games in the pack I've always found that I would finish a Rugby game blowing harder than in a League one.
As for the fatties comment. At the elite levels their are very few of these fatties left in the professional environment. The only one to have built a successful professional career in the last decade or so has been Ben Robinson as far as I'm away and even then, he's got a fairly large tank in terms of his ability to maintain his efforts. Most Props at that level in today's game may still weigh the 120kg or there abouts but these boy's a huge blocks of muscle. But hey, let's just by into the old stereotypes.
But given the nature of the thread my reference was in respect of the pro levels.
Fatties is more in reference to the fact that a lot if rugby forwards don't appreciate the need in rugby and all sports to have the ball in attack in space where the defence is weak. So they just keep driving the ball a metre forward and rolling over on top of each other fighting for possession. Looking for a penalty instead of kicking it out to the backs who will try and slice through.
For the record I have never played a game of league in my life, played a few seasons of union as a 5/8 and a lot of touch and a bit of oztag.
On a side note what does the term mungo mean? Besides some sort of league sympathiser?