I see Aldi have an offer, starting to-morrow, for duvets (and pillows) containing Duck feathers. I've recently bought a duvet with goose feathers which was more expensive than the Aldi one. I'd like to buy an Aldi one if it's as good as my other purchase. So, can anyone tell me, which type of Duvet would be the best, one containg duck feathers or one containing goose feathers - or (everything else being equal, weight, etc.) is one as good as the other.