isn't it funny? I've heard of the crossbar for flight directors, but we (USA) don't call the other one a moustache. Some of us call it a "HOWARD JOHNSON ROOF".
I can' t stand the crossbar flight director. I like the other one, which we call, "howard johnson's roof".
It is also called, more properly, the single cue, vs the dual cue.
the dual cue being the crossbar.
I've flown both, the single is so much better. More precise.
by the way, howard johnson's roof, refers to a chain of restauarants and or hotels called Howard Johnsons popular in the USA at one time.