I am currently in the market for a new -10° F (-23° C) sleeping bag.

The choice comes down to a Western Mountaineering Lynx GWS or a Feathered Friends Widgeon ES, since I want the best protecting shell against humidity. The new ES material selection of Feathered Friends sounds quite interesting.

I know that several people complain about the GWS shell that allegedly traps moisture within the bag. However, when asking about their circumstances, they've never (!) used a VBL inside. So for me, such complaints are more of a user error than a design fail of the sleeping bag.

When talking about both bags, there are a few but important differences:

• The WM Lynx does have V-blocked baffles, while the FF Widgeon does only have continuous baffles
• The WM Lynx (GWS) has Gore Infinium Windstopper for shell, while the new versions of the FF Widgeon do use Pertex Shield EX, but with a large front side panel made of Pertex Shield Air. They claim to improve the breathability with this panel.
• The FF Widgeon does have the whole collar made of Pertex Shield EX, what should prevent breath condensation from entering the bag. WM does not advertise something like this, but I think they do also use the GWS material in the whole collar area, no?

Now I am thinking about...

• if the V-blocked baffles are seriously beneficial in such temperatur ranges. Due to the fact that also Feathered Friends will employ them for their -25° F (-31° C) bags and below, I think that blocked baffles could have their authorization for sure.
• if the material difference between gapless Gore Infinium and mixture of Pertex Shield EX with Shield Air panel will create a remarkable difference?
• if I really want/need Pertex Shield Air's breathability in a winter bag, although I'm always using a VBL?

What are your expectations about this? Did anybody here test one of those new FF "ES" series bags?