The difference is that there was no directive. How could their be? The EBA was negotiated by the then executive of AIPA. Why would they issue a directive to vote no to what they had just negotiated?
AIPA isn't suing the JPC. All you are showing is that you have no idea about what that case is about. In fact, if AIPA wins then Jetstar pilots aren't going to lose international flying, they may have a very big win.