User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-24173056-20141122062809/@comment-1359322-20141122084708

Why would Vali be. Vali has 8 Devil wings, 2 DD wings. Issei only has 2 Devil wings and 2 Dragon wings. 10 wings vs 4 wings, Vali wins. He can still laugh at Issei for his lack of wings.