Peter Wiggin (Ender's/Shadow series) vs 'The Jackal' Adrius au Augustus, Red Rising

Peter is raised as normal under Hegemony rule on earth and rejected from Battle School. His brother, Ender, was accepted instead and defeated the Formics yesterday.

Meanwhile, Adrius au Augustus was raised by his father on Mars as a gold. At the institute, he was defeated by Darrow.

Suddenly, both are transported to the United States in 2025 and have set their sights on ruling the world. Which of them would unite earth under their rule?

Bonus round. They instead are transported to a UFC octagon in place of Dricus Du Plessis and Sean Strickland. Who wins the middleweight strap? EDIT: this fight has no rules, for fun.