Others who were there can correct me as I may not be as versed as them, but here are a few things I noticed:
LA best D played all year. Obviously to keep Upperman at 50 points, D had to play a part. Sells played a lot underneath on D with Choate and McDonald. I think Choate's improvement and much needed height this time around along with a few Sells key rebounds caused enough problem on getting the big boys rolling. Last game Rush dominated underneath.
Rush and the other big guy had foul trouble early. I think the one big guy had 3 mid-way through 2nd quarter. Upperman did not substitute as much as normal. Grissom and Fox played, Allen was absent and didn't see Bell get in. Not sure if sickness was going on?
Upperman rolls in spurts. Enough disruption allowed that to not happen. They didn't go on their normal tear in the 2nd quarter which is what they seem to usually do. Halftime was 27-20. They did get up around 12 or so with a few big treys but didn't run away.
Sells had 10 points last game. McAllister played tremendous D that game. This time the D was still there, Sells was just Sells. 5 treys, a couple DEEP, and one a 4 point play. 9-9 from the line (typical 90+%). A few great dishes to Choate underneath whenever he drove and they double and tripled down on him. Fewer bone-headed turnovers, although still the frustrating forced passes in traffic popped up. Luckily, the damage was minimal.
Again, no expert, so this is just my amateur observations. The planets almost aligned in the district but not quite.