I might be in the minority here, but I actually preferred Challenge 2 to live 2. I guess for big rugby league fans the choice is obvious. Yet as a non rugby fan, the gameplay just seemed a bit simpler and more enjoyable. It was easier to pass, easier to run and score tries. The computer players were predictable in the movements meaning I was able to pull off more interesting plays. The controls just seemed to click quicker too. Take this with a pinch of salt as a rugby fan, but as a casual, while both are good, I'd go for challenge.