A very interesting proposition. First, some general notes: Nelson will have incredible explosiveness. His trains to be able to exert enormous amounts of power over fractions of a second. I do not doubt that he could have a 39" vertical jump. However, I can't see him having any sort of speed endurance - there is no need for it in his event, so I doubt he trains much for it, if at all. Also, simply his sheer bulkiness will be a great disadvantage in events like the hurdles, pole vault, and high jump. He would probably have to lift his center of mass 6" higher than Geb due to the size of his chest to clear the same height. Now, Geb, if we rolled back the years to his younger days, is pretty explosive for a distance runner. We know he did significant amounts of plyometric training, and he had great flexibility. His upper body strength isn't great, but above average for a distance runner. His small stature put his at a disadvantage is certain events. The other thing we must remember is the decathlon is an endurance event - you are damn tired after two days of continuous events.
Now on to an event by event breakdown:
100: Nelson smokes Geb off the line, and is well ahead at 40 m, but he is already at top speed, and rigging quickly. Geb, closes fast over the latter part of the race, and nips Nelson at the line. Geb: 11.60 Nelson: 11.72
LJ: Nelson's power on display here. His bulkiness is over come and he puts down a nice 6.23m. Geb keeps up admirably though, and posts a 5.46m. All those plyometrics a paying off.
SP: No contest. Nelson is a bit fatigued, and is short of his personal best, but still manages a 21.80m. Geb struggles and records a 10.12m
HJ: Again, the power of Nelson works to his advantage. With his 39" vertical leap, he almost jumps over his head, at 1.80m. Geb is less sucessful, achieving only 1.55m
400: Finally, Geb can redeem himself. Showing very little fatigue from the day's events, he runs a very impressive 49.69. Nelson struggles mightily in the home stretch to stop the clock at 56.21 seconds.
110h: Day two starts promisingly for Haile. Displaying his flexibility, he overcomes his height disadvantage to win the hurdles is a time of 17.32 seconds. Nelson looks awkward, and runs into trouble in the end of the race. A time of 19.02 seconds is the result.
DT: Back to the comfort of throwing for Nelson. Wins easily with a best throw of 44.26m. Geb does better than he did in the shot, but still way behind Nelson. 24.45m.
PV: Having secretly trained for a couple months, neither competitor kills them self. Nelson does manage one broken pole however. Geb posts 3.10m, with Nelson not far behind at 2.80.
JT: Geb posts his best throwing performance and records a throw of 40.85m. Nelson still wins easily with a toss of 55.33m.
1500: No surprises here. Geb is tired, but that only slows his down to a 3:34 performance. The lumbering figure of Nelson finally makes it across the line, exhausted, in 6:38.
Final point totals:
Geb: 6004
Nelson: 6024
Incredibly close competition. In the end, Geb's running prowness isn't enough to compensate for his lack of throwing acumen.