Science Fiction author Ultra Kwon explores the paradox of Haitai OH YES! Chocolate Cake. Regarded by one generation as the Choco Pie Killer, it is the greatest rivalry lost to the millenials, a food matchup of epic proportions – cake vs pie. To grade schoolers of the mid-80s to 90s, Choco Pie vs OH YES! was a warring debate that was about more than just snacks. So much more. And nothing else objectively mattered.