monarch - more waterproof, but the material feels thinner. The thing is a extremely packable, extrememly technical, shell. Not worth full price, but I got mine for half off and its very nice. Very thin for packing, not heavy, but will keep you dry as fuck. Monarch is long and slim, and since it doenst have the mesh lining, it has a much slimmer profile.
Anomie - thicker material, and it has the mesh lining, which acts as a insulator, albeit not much. I never got wet in my anomie, but I like the monarch a bit more. just less bulky.
Never thought I would liek the Monarch as much as I do. Its just the perfect thing to put on the outside, just need to layer appropriatly. For a cold day, its a long sleeve, flannel and hoodie (im a wuss). I had it for a 35 degree day, and it was just a long sleeve.