Til you gave the further info ..... I had other thoughts!!!
And could only think .. You're joking! a quilt isn't going to save any marriage! :)
What you have described would seem as though you put a light/non-warm batting on one 1/2, and the other 1/2 you pile it thick with warmth!!
That could make for a thick/thin appearance. Also difference batts quilt up different for a different finished look.
Would flannelette and polar fleece be close to the same final look, yet give the different warmth levels?