only 曾卓兒師傅 is the northen style. The others are southern, or Cantonese, style.
All Cantonese style Dai Dao (大刀) include the imagination of 關公: 抺鬚, 看書, 騎馬, 拋刀, 磨刀.
The northern style Dai Dao don't have any image reflect 關公. Besides, in northern style, the 撲刀, which shorter and smaller, is more common than Dai Dao.