Let's start with the obvious:
The kids in Divergent aren't fighting in a game of life o death on television.
Yes, they both take place in dystopian worlds but their dystopian worlds are different than eachother. in Katniss's it's poverty, with Tris, she has it a little better than Katniss.
But really, I don't like them being compared to eachother. it was the same with Harry potter and Twilight and look how that turned out.