User blog comment:B214/Volume 21 info & spoilers/@comment-26285797-20160715154901/@comment-24.113.252.213-20160719162020

That's kinda reversed, isn't it. In Issei and Vali's dynamic, Vali (the Rival) is somehow always ahead of Issei (the MC).

While in Goku and Vegeta's dyNamek (get it?), Goku (the MC) is somehow always ahead of Vegeta (the Rival).