Luso, haven't tried ProDry yet so can't speak to that. Maybe Randy (TarHeel) can.
Kab, The issue I have had with Nike and Under Amour is longevity/durability. I think both of those are much tighter around the ankles (esp. UA's). The comfort of the FJ ones is like i'm not wearing socks (not loose or anything, just a remarkable fit and not constricting). In addition the extra padding in key areas enhances the comfort. The Nike's are a second place to the TechSof Sports and UA wouldn't ever be on my list of purchases again.
hope that helps