Just to clarify, it’s not about the 3 oz of overall weight. An easy way to look at the warmth is to multiple amount of fill by the weight, use that number as way to compare warmth.
In the above example, it would be 2550 vs 1950. The poster was saying that 3 oz of 850 would be warmer
In the above example, it would be 2550 vs 1950. The poster was saying that 3 oz of 850 would be warmer