Warren Buffett is 84. Only the Oracle of Omaha and Berkshire’s board know who’s destined to eventually fill his Brooks running shoes. Speculation spiked in March, when Vice Chairman Charles Munger name-dropped two executives in the company’s annual report: Ajit Jain, who heads its biggest insurance business, and Greg Abel, who oversees energy. (They’re known to be team players, unlike the Old Testament rivals their names evoke.) Who’s the more likely candidate? Let’s compare.

Who’s fattened Buffett’s wallet more?