Did JY elaborate on the qualitative differences between the sword styles used by the schools of the 5 Peak Alliance in XAJH (SoD)?
After reading about Mo Da, head of HengShan and the description of Bai Huan Qian Bian Heng Shan Yun Wu Shisan Shi (translated by Lanny Land as Magical Thirteen Phantom Stances of Hengshan or by Temujin as Hundred Changes Thousand Illusions Mt. Heng Cloud Mist Thirteen Stances) this got me thinking.
If the 13 stances captures the essence of HengShan swordplay, then fast, complicated and unpredictable moves are the key features of their swordplay. Though I'm sure that this observation is much too limited.