I have not used the GW stuff, but I have unlined bucksuede pants and a saddle cloth jacket, both of which are very quiet. Bucksuede and saddle cloth are very similar but are made with different materials. Of the two, bucksuede is a bit softer. I like the fact that burrs won't stick to either one, and boy, do we have burrs!
I got both the pants and the jacket from the Predator Camo website for $20 each. I'd like to have a pair of saddle cloth bibs, but $200 for one pair of pants is beyond my reach at this point in my life.