Both Mei Chaofeng and Zhou Zhiruo learned the shortcut methods to Jiuying Zhenjing. But the version of ZZR's version was different from MCF's. MCF's 9 Yin White Bone Claw was more vile and vicous than what ZZR learned. ZZR's version was less vicious. It was modified by Huang Yaoshi, and he made the strokes more orthodox after the death of MCF.
But whose 9 Yin White Bone Claws was more powerful, when pitted against each other, how would a blind MCF fare against ZZR who also have basic E-Mei 9Yang Gong as her foundation?