As the season moves along, we learn more and more about the teams and get more data to work with. Perhaps the most relevant data for direct comparison is the first matchup of two division rivals for when they play again. This week offers the first divisional rematch on the schedule.
The first time these two teams played, Kansas City had just come off two embarrassing blowouts to teams that we didn't know at the time were as good as they turned out to be (Detroit and Buffalo). Still, Kansas City managed to keep it close at the end on the road. That game was the first sign that the Chiefs weren't that bad and that the Chargers weren't as good as many had predicted. Now that they're playing at Arrowhead where the Chiefs have a solid home field advantage, I don't see how they would be blown out.