Can you measure the difference between Down and Synthetic materials (Primaloft, Quallofil, etc.)?

Question

I am looking to shop for a new winter jacket and I noticed how some jackets are insulated with 100g of Primaloft. Would this be compared to a 550 fill down Jacket, or more?

Also, what is the difference between 100g of Primaloft insulation vs. 200g of Quallofil insulation. I read that Primaloft is better than Quallofil, but given that the jacket is insulated with twice the amount of quallofil, does that make it warmer? Thanks.

Answer 1

http://www.sierratradingpost.com/lp2/dow...

That give a s good overview...but not a specific chart with synthetic fill rating to down fill rating.

From my experience selling the stuff in the past, I can tell you Primaloft 100 is the lowest as 550 Down is also the lowest. However, I have a Primaloft 200 vest and find it much warmer than my 700 Down vest.