User blog comment:Stbk22/Possible Power up's/Techniques for then new group DxD/@comment-1359322-20140110163738/@comment-1359322-20140117122417

In Zephydor's case it's plain stupid arrogance with no backup. Sairaorg was known by all as the "Strongest Young Devil". Zephydor was too immatured to think that he could beat Sairaorg easily when he can't and got crushed decisively without any remorse.

Riser has defeated Issei in the Rating Game once, he knows he can beat Issei, sure he lost his second fight and got some Dragon phobia but at least he didn't lose in such a pathetic was as Zephydor.

Zepydor lost completely, his team got annihilated while Sairaorg's team didn't suffer a single casualty and Zephydor himself lost without being able to do anything. Riser was able to put up a fight, that's the decisive difference.