2x07 Black Heart, White Mountain

I'm so confused, what's the difference between the purple Abbotts and the regular Abbotts? I must have missed this detail... Glad to see Sunny back alive though. They could have fleshed out Sunny's memory/flashback a bit more, imho. It felt a little rushed, especially when there were so many other side stories to tell (e.g. Jade's capture).

EDIT: OK, found out the difference. Purple are apprentices, while orange ones are trained, which makes sense, since cutting the purple ones would make them go out of control and attack.