This is the biggest difference by far. I went to one of the last (or maybe the last?) matches at Cardiff Arms Park - Wales vs Australia.I love rugby and think it is a great game. I also agree with @scaramanga in that the crowd is less full of clams. You can sit in amongst the opposition and not have to worry about what will happen. You can engage in conversation with the opposition and the crowd are more up for it.
If we can beet them by more than 7 points as well they wont get a point for losing.
I hate this getting a point for losing by a small margin. If you lose, you shouldn't get any points.