I have a couple pairs of the 1403s as well and I love them. I wore them last year in Utah on an Elk hunt and they were awesome. A little light for tree stand hunting but great if you're moving.
I had emailed then about some specific questions I had and the response I got was very helpful. This is a cut and paste from the email I got back from them.
All our socks are knit the same using 168 needle knitting machines which give a higher stitch density of around 1441 stitches per square inch. All of our socks are knit the same way regardless of the category they are in so the heels are knit the same way with extra reinforcement and they are equally durable.
We carry 6 weights of socks. From lightest to heaviest, they are: ultra-light, light, light cushion, cushion, full cushion and extra cushion. We do not have a temperature rating but this range gives you an idea of our lightest to heaviest. Hope this all helps you.
The Men’s Hunting Boot Sock Cushion (1460) has an extra 1.25” stretch in the calf and it is cushioned on the bottom and up the shin. The Hike/Trek Via Ferrata Boot Sock Cushion (1926) and Hiker Boot Sock Cushion (1403) are cushioned on the bottom and up the shin and different colors but same contents. Hope this all helps you.
i got a response for similar questions a week later.missed the call but they picked up the phone the next time i tried. there styles are kinda confusing. for an upcoming trip with moderate hiking they said to stay with light cushion versions.i usually go for thicker sox but i may give it a go.
^this. I have made it my mission to wear a pair out and haven't in three years. I wear them year round as well. I'm an evangelical darn tough fanboy. I like the 1403 the most but they are all good.