User blog comment:B214/Volume 21 info & spoilers/@comment-99.118.13.217-20160610101418/@comment-26926813-20160613100858

You don't understand me. Issei have power of Infinity like true Ophis, Vali doesn't have it well in that case DxD G (full power of course) > DxD L. Ophis Blessing help Vali to release true Licifer power, but it's not PoI like Issei