Sword, because it require a lot of skills to win in a sword fight, in my opinion it require less skills to win in gun fight.
But I would choose gun depending on the situation. Also I take into account that gun are limited by ammo and swords are limited by range. But anyhow I prefer swords because both Himari and Saber hold swords :D
A given mission, mechanical assault, manufactured devotion.
Red eyes, an upside-down form. Even the twisted shape was made to be that way.
No matter how cruel the slaughter, worse than a demon's,
or how gentle the kindness, greater than an angel's,
a machine has neither will nor madness—only code, and a few bugs.
So why, then, does it feel so unbearably sad?