Alex Davy casually mentions Vader equipping the X1 title + ATC for the Season 2 finale of Rebels. So, title compatibility confirmed?
...
No.
Darth Vader being able to equip TIE/x1 to his TIE advanced x1 has nothing to do with breaking the rules by equipping TIE/x1 to a TIE advanced v1.
Edited by Blue Five