Hungarian Goose, Goose or Duck Inner?
Duck is the most cost-effective of the three options, and is the most readily available, it's a great all-rounder, and a 90/10 fill will keep you toasty this winter!
If you want to go a step up, Goose is slightly more rare than duck, and goose down has a larger cluster than the duck, making it a bit more insulating, as it is able to trap more air.
Now to Hungarian Goose, Hungarian Geese live in a very cold climate, and because of this they tend to grow very, very large, thus their down cluster is larger again than Goose (almost double the size), making it extremely efficient at insulating as those large clusters are able to trap in more air. Hungarian Goose down is the ultimate insulator and is ideal for those who feel the cold or who prefer lightweight products. It also comes with a pricetag at least double that of Duck & Feather inners!
You spend half your life in bed, so why not treat yourself to a beautiful new down & feather inner. If the budget allows definitey go for Hungarian Goose, it is amazing quality!
P.S - just as a side-note, you will never see a 100% down inner in NZ (like you do in other countries) our certifications here only allow us to go to a 95/5 fill (as there is always a chance a stray feather or two will sneak in the mix)!