Esteban wrote an answer about Arc'teryx Cerium LT Hooded Down Jacket - Men's on November 18, 2013
Get the Arcteryx.
Feathered Friends makes great sleeping bags , but in my experience, all of their clothing is cut really strange and runs about 3 sizes small. You might like it if you are a really small person with no torso, but you should probably try one on first.
You can only tell so much by comparing specifications.
Both jackets will use top-notch materials.
The arcteryx piece will be perfectly cut and true to size.
However, the fit of the Feathered Friends jacket might be more "esoteric" so you should probably try it before you buy it (or just get the arcteryx, which is a sure thing).
Hope this helps.