World's Toughest Mountain Race?

Looking for an adventure this October? How about this one in Malaysia? The Mt. Kinabalu International Climbathon, is a race to the summit (13,435 feet) and back down.

What I find interesting is they give a decent amount of prize money for a mountain race- $4,500 for first place down to $300 for 10th, then $100 each for the next 5. The winner also receives a 25 Carot Gold Pendant (prize money)

The race distance is a half marathon, and in 2009 the winning time was 2:40:41 for men and 3:20:15 for women. 15th place for women ($100) was 5:04:15, so ladies if you want to win some prize money, this is the race.

Several years ago I did the Mt Fuji Climbing Race, a grueling half marathon coming up in just a few weeks. Mt. Fuji is listed at 3,776 meters (12,388 feet). The Fuji Race ascends a total of 3000 meters (9,842 feet).

Which race would be more difficult? I'm not sure what elevation the Kinablu race starts, but the ascent portion is only a little over 6 miles. The summit, however, is more than 1,000 feet higher than Fuji. The year I ran Mt. Fuji, I believe the winning time was 2:38.