Two brides

Congrats on the upcoming wedding!

I think at the end of the day you should wear whatever you're comfortable with!

I think the black dress would fit with your theme so try on some dresses and see how you feel.

A more gender non-conforming idea may be to wear a tux jacket with a ball skirt or even a traditional pant suit/tux with a blouse or high heels.

The options are endless!

I've seen some really awesome Bridal paint suits. Some are lacy and some are not. Maybe an option?

You can pick different, but complimentary styles of dresses. PP's mentioned it also, but you can do a really nice pant suit. I also think the different colored dresses is amazing, but I imagine you and your fiancee don't have the exact same style, so even if you both wear white dresses, you'll be able to tell you both apart by hair, dress, makeup, etc. Try everything on and see what you prefer!

We both had dresses. They were the same color, but slightly different styles. But really, you can do whatever you want.

You could rock a black dress, a white dress, a pantsuit - whatever makes you comfy and feel awesome - you're getting married wear something that makes you happy

The black and white dresses could be an amazing look, but I don't think people will have a hard time telling you both apart. You could also wear a jumpsuit for a feminine look without a dress. While my wife wore a suit for our wedding, I have seen plenty of my friends both get married in dresses. Wear what makes you feel most comfortable. Not all dresses look alike, and certainly not all brides (if you're choosing to use that term). Good luck and happy planning.