That's a good drawing by slowhike. Also, look at the picture on the JRB MWUQ4 page of them stretching the quilt out tight...and there's still no compression of the down. That's the advantage of a differential quilt...you can snug it up tight to the hammock and none of the down will be compressed. Warbonnet Yetis are also differentially cut. KAQs are differential synthetic versions.
A non-diff quilt is generally a flat quilt...it's two pieces of the same size of shell material sewn together. Like the Nest and no Sniveler.
Differential quilts usually have shaped baffles as well, whereas a flat quilt's baffles will generally be rectangles of mesh. The diff's baffles might be shaped like a flattened-out "U", with wider U's at the shoulders and narrower U's at the knees.
“Republics are created by the virtue, public spirit, and intelligence of the citizens. They fall when the wise are banished from the public councils because they dare to be honest, and the profligate are rewarded because they flatter the people, in order to betray them.” ~Judge Joseph Story
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IMPOSSIBLE JUST TAKES LONGER