A socks effectiveness largely depends on it's ability to reduce airflow around the hammock creating a warm (and wet) layer of air around your hammock.
more airflow = less warmth & less condensation
less airflow = more warmth & more condensation
To complicate matters -
I've built very breathable socks and used the sock pulled only up to my shoulders. On a windless night, I could feel a great deal of difference between the air temperature at my knees compared to my head.
I've also built less breathable socks that acted like a giant pair of bellows when the wind was gusty, expelling valuable warm air and sucking in freezing cold air. In this case the sock actually made my hammock feel colder.
There is no magic fabric and few answers to most of these questions. Most any hammock sock will work terrific if vented just right or perform terribly if used incorrectly. The trick is to build one out of a given fabric and adjust it according to the specific conditions you face each night.
It's real hard to say that one specfic fabric will work well and another won't.
The best advise might be to build one out of cheaper 1.1oz dwr ripstop and give it a try.