Goldenchild,
FF explained perfectly the meaning of down quality and fill.
What do you want the jacket for?
The jackets you linked are designed basically to be used as mid layers or light outer layer use. One doesnt have a hood which is good for day trips, camp life and city use but not as a main, last line of defense against the cold jacket.
Feathered Friends makes some superb jackets with good selection of models for a wide variety of conditons and uses.
I basically own 3 insulating jackets, a bomber all conditions stops any weather Down Parka, Outdoor Research Superplume Parka, 320g of 800 down fill, insulated hood, 2 draft tubes and a nice weather resistant Pertex fabric. bomber jacket, would trust it up to 6k-7000M easy, can go over everything.
The other, a First Ascent Igniter synthetic (100g Primaloft 1) jacket which is awesome when conditions are not that extreme. Can be used as midlayer in very cold conditions (it isnt too thick). Really good outer layer also over shell but awesome by itself over base/mid layers. Basically windproof. Has a very nice hood. What I take in 15F and warmer weather.
For city/town use I have a MH Sub Zero jacket, no hood. Nice, cheap, good quality "beater" jacket.
A lighter down sweater is also a good alternative for this and also camp or midlayer use if conditions are not extreme.