Angelo,
There is no "history" between these two teams - Norwood have beaten Sturt each time, most recent clashes have been fairly close with Norwood good enough to get the win each time.
I think it has more to do with individuals from other clubs which has a bone to pick with one of these two teams.
As someone who has been able to see these matchups a few times this year, I can assure you they are played fairly and in good competitive spirit, both coaches IMO are excellent young coaches, and the standard is quite remarkable for this grade. As long as you don't go there expecting a "feud" between the two, you'll likely get rewarded with a good game.