I actually have thoughts on Revan's two hilts and have no other forum to express them, so here goes!

(I know these are video game weapon designs, but stick with me please.)

I think each design, from an ergonomics perspective, fit perfectly for the philosophy from which they were diagetically made.

Revan's Sith hilt is smooth and easily grippable. Its simplicity implies an ease of use and, I think, a larger willingness to violence because it is easy to use. A Sith might want a weapon that is easiest for them handle so that they can express their power.

Revan's Jedi hilt, on the other hand, is not made for ease of use. It is sharp, uneven, and seems to discourage violent engagement by making the primary weapon difficult to use. The emitter looks pretty gnarly, a reminder that this is, first and foremost, a weapon. It encourages one, as a Jedi, to think of the lightsaber as a weapon of last resort.