I practice both Chi Sao (sticking hands) and Chi Gerk (sticking legs). In the beginning, I learned Chi Sao from the basic WCK goat stance, or high horse training stance (YCKYM), without using any footwork. Later on, I learned a JKD variation of Chi Sao performed the exact same way, except from a JKD ready stance, or phasic bent knee stance (BJ), in which there was more movement. However, as I started to progress in martial arts, I learned more WCK stances and footwork. Over time, there were fewer and fewer differences between them. I would say the only difference I see now is that JKD places more weight on the front leg, while WCK places more weight on the back leg. But even then there are times when both JKD and WCK will use a 50/50 neutral stance, so I guess it really just depends on who you're training with. In the style that I practice now, both stances are included and we are allowed to use whatever stance we want, because Chi Sao and Chi Gerk are still practiced the same way regardless of style.