The best kicker in 98% of 800 races is the one who slows the least. This applies doubly at the HS level.
Let's take two 2:10 guys. Billy Tipikal goes through the 200 in 29 flat, the 400 in 61 (32), the 600 in 1:35(34) and finishes in 2:10(35), but tying up rather badly.
Kenny Hunter, on the other hand relaxes (relatively) through the first lap in 31-high and 63(32), and starts reeling in Billy down the back straight. He still is a second back at the 600 in 1:36 (33) but comes on like gangbusters to nip poor Billy at the tape (34 last 200). The difference between these two is:
-Billy is actually more fit, but he threw it away in the first lap, and paid the price on the second lap
-They both run the same finishing time, but Kenny is coming after a hard target (Bill's sorry ass) and is mentally more fresh and energized and gets the lean perfectly.
If Billy learns from his mistakes (probably not), he will handle Kenny with ease. Kenny, on the other hand, is energized by his win and carries the upper hand into his next race.