If you are like me and don't take trekking poles and would opt for the comparable heavier more waterproof floor in the Lunar Duo, then your talking about 8 oz. more weight, (and perhaps fragile carbon poles to hold it up) You also don't get a porch setup, great for views and venting even in the rain. Since I use the DR as a roomy solo tent, I don't need the extra space of the Lunar Duo, though it would be nice, and I do like the zippers, but not sure how to make them work with all the setup options of the Double Rainbow.

For two though, the porch setup is probably not that much of an option (at least not on both sides), since I doubt your gear would stay dry in the vestibule area, and the space inside is more critical.

I know that I posted this under the gear link, but if anyone is searching Google this thread comes up, and I hope that my review can help someone.

Video Review Six Moon Designs Lunar Duo