marmot, millet, mammut, and patagonia are the only two companies you listed that even matter in this discussion - and most of those guys are using GT for their top end stuff. the rest are not making the kind of clothes we give a fuck about for snowboarding
i would argue that breathability doesn't matter, because anything that breathes as well or better than GT is good enough. all my jackets will have pit zips, and they will all get used. the real key is waterproofness and how long it will stay waterproof (as in years)....
in MY experience GT is still the king, and on top of that Arc'teryx is the undisputed king of shells. its not just that they are using GT - it is that they are sourcing the best, lightest weight, strongest, most comfortable face fabrics to attach the GT laminate to. the fabric they use shits all over HS/Trew/Marmot/Patagonia. this makes a huge fucking difference.