The Contrail has been out for some years, whereas the Moment is fairly new. I did run into a couple of Moment owners at Trail Days in Damascus this year, one was thru-hiking."I saw a number of people on the trail last year with the Contrail, didn't see anyone with the Moment."
I used my Contrail for most of the AT this year, or rather I should say I carried it for most of the AT --- started with a Gatewood Cape and switched fairly early on, but slept most often in shelters.
The Contrail is a great tent, I like it a lot.
My sense is that the Moment is a great tent too.
I'm nevertheless personally moving to a Lightheart Solo, one of Judy's new "awning enabled" versions, and I'm opting for a silnylon floor and cuben upper. My sense is that this will be a very nice "sweet spot" in terms of weight and functionality, better in humid/rainy situations, hopefully as good as the Moment in windy conditions (if enough stakes are used), wonderful in clear and buggy conditions. Not cheap with the cuben option (which is, however, just an option), but pro-rated on a per-day basis, not bad if used on even just one thru-hike I think.