User blog comment:B214/Question and Answers 6/@comment-185.112.105.215-20161128063206/@comment-10330822-20161128175254

Ophis is a Dragon God, and she is considered to be stronger than the Heavenly Dragons.

Mostly all God-Class are naturally considered to be superior to Heavenly Dragon-Class. That being said, you could prove otherwise on a one-on-one basis. It would seem, in the future at least, Issei, the Red Dragon Emperor, is far stronger than Loki, and most God-class.

However, this may have more to do with Issei's own unique power and less about Ddraig.