Okay, you do know the reason she resembles Setzer is because she was used as the basis for his design right? So you can't really say her coat/outfit resembles his, its the other way around, his outfit resembles hers. You are not wrong that he backstory has he being raised as a boy and even dressing like one, but dressing like a boy and being a cross-dresser aren't mutually exclusive. As for her outfits, they aren't similar to Bartz's they are similar to Lenna's and a few of Krile's. Also why does cleavage have to be the first thing to show she's a she, what if she was flat chested, T.T How mean.
Knight: Her armor is identical to Lenna's in color and style
Monk: Both her and Krile are wearing pants suits, and in sprite form it resemble Lenna's dress
Thief: All of the girls have patterns on their scarves
Black Mage: All of the girls are wearing robes, not cloaks
White Mage: All of the girls have their hoods up
Blue Mage: All of the girls wear a beret in addition to their mask
Red Mage: None
Time Mage: None
Summoner: None
Berserker: All of the girls are a type of cat, and the boys are dogs
Mystic Knight: I'm sure this one is self explanatory, lol
Mime: None (its their normal outfit enhanced)
Beastmaster: Lenna and Faris are the only ones without horns
Geomancer: None
Ninja: Lenna and Faris are a shade of purple, and all the girls wear scarves
Ranger: None
Bard: None
Dragoon: It's hard to describe, but the best thing that could be said of this one is none of the girls wear pants, but that could also be grasping at straws
Dancer: This is the one outfit she has where Faris and Bartz have similar outfits, compared to the others
Samurai: If I'm going by sprites, at least the ones I can see, none of the girls have helmets on, but in the artwork she does so not sure.
Chemist:None
The 4 extra jobs are all unique to them and their color scheme
Also you are describing her outfit as a breastplate/pants/boots combo, can women not wear those? And the other thing is you're saying compare her to her more feminine sister... why? Does Lenna being more feminine make her more of a girl and Faris less of one? female=/=feminine and male =/=masculine. Not trying to turn this into anything just making it aware.