Its a bit of a fallacy that lightweight synthetics in general are more resistant to being stored compressed, both need storing uncompressed to retain their loft. Synthetics will also lose their loft more quickly than down when being constantly stuffed and unstuffed.
The biggest difference is their tolerance to moisture-synthetics will still keep you warm when damp and will dry out quicker in the field than down. Down is next to useless when wet and suffers loss of loft when damp.
Some synthetics that are made from monofilaments will tolerate long term compression much better, Not sure completely but I don't think anyone makes a quilt from it ATM and its quite heavy compared to hollowfibre or multicore filaments like Primaloft. My Wigg's bag is monofil and tolerates stuffing and compression very well.
If you plan on possibly getting your quilt damp and don't want the worry, your car camping and weight isn't so much of an issue or your on a budget, get a synthetic.
For better life, long term value,compressibilty, weight, comfort and wallet emptying properties, get down to some down.
FWIW, I use both depending on the kind of trip.
Bookmarks