I’ve only handled Feathered Friends in the store. To me, they have always seemed “less lofty” (highly technical!) than Western Mountaineering bags. I also find it odd there is no mention of loft on FF website.
Either are exceptional bags, but I’ve just stuck with WM going back to 1992 when I got my first. I’ve always gotten mine with overfill. Must say, I also prefer the collar option on WM bags over no collar. A collar is really nice to keep warmth in while allowing more hood adjustment strategies.
All we have at our house now are ExtremeLite bags, but I have to agree with Gabe above… I think the microfiber is more versatile.

