Are all 20 degree bags equal? Obviously, there is quite a bit of discussion on these boards in regards to standards in testing sleeping bag ratings (particularly in regards to the relevant comfort of men and women). I find it difficult to believe from my own limited experience that my lighter bags are as warm as some of my heavier bags, even if the same temperature rating applies. My Helium bag, rated at 15 degrees, doesn't feel as warm as my Feathered Friends bag, also rated for 15 degrees. Both are good bags, but the Feathered Friends bag is substantially warmer.
I really would like to try other very light bags. I just wonder if they are well suited for where I hike - the Pacific Northwest primarily. The cold, moist air does a number on my down bags compared to the relative dry air of the Sierra, for example.