I've been comparing underquilts fill rating per oz to different vendors. I'm looking for feedback to see if individual customers can report any noticeable differences between perceived warmth ratings from different underquilt manufacturers. I'd want to guess that the vendors who use more oz fill weight would typically feel warmer when compared to others, but then again, I've never seen any consistent complaints about any vendor when it comes to warmth and comfortability. I'm only comparing fill weight here, not total finished weights. Here goes ---


Warbonnet Wooki XL with 950 fill power = 8.52oz fill weight
Warbonnet Wooki XL with 850 fill power = 9.84oz fill weight
Hammock Gear premium incubator with 850 fill power = 12.11oz fill weight
Hammock Gear premium incubator with 950 fill power = 11.02oz fill weight
Hammock Gear economy incubator with 800 fill power = 13.2oz fill weight
UGQ Zeppelin with 800 fill power = 14.42oz fill weight
UGQ Zeppelin with 850 fill power = 13.64oz fill weight
UGQ Zeppelin with 950 fill power = 12.34oz fill weight


All info came from the technical spec sheets from the vendors' websites.
They're all roughly similar at about 76 or 77 inches long and about 44 inches wide.
The warbonnet wooki XL seems to be the lightest weight underquilt when comparing all 20 degree quilts.

What say ye? Which UQ is the warmest?