Okay, Ryley was able to survive an event that had a 1/157 chance of surviving and survive an alien bacterium that wiped out all of the Precursors and potentially many more civilizations, Robin was able to survive with a secondary consciousness inside of her cerebral cortex for most of the game and take NO damage when crashing the passenger shuttle onto Sector Zero's surface. It would be very, very close. A few deciding factors that would enhance the survival of particular contestants are, 1, Ryley knowing the terrain extremely well, because he probably stayed there the rest of his life due to Alterra not accepting him back to the workforce, and 2, Robin's AEP is designed for lower temperatures so it might do as well in 31°C. The final reason is because Ryley is kind of going insane. Robin seems to be a lot more calm, content, and relaxed, but Ryley is no longer accepted by humankind and might actually despise them due to Alterra's never-ending effort to make money off of people. So in this case, I would say Ryley has the advantage. Also, I don't know why they would be fighting. I feel like they would actually get along pretty well, having such cool stories. Maybe Ryley would start due to sanity issues though.
