Disclaimer: I'm not affiliated with any of the above or make clothing, I'm just fascinated by technical outdoors gear and do way too much pointless research. =)
Patagonia does use Toray - look for the "FullRange" insulation such as in their new Nano Air.
Arc'teryx uses Toray for their coated down as well. (So does Kuiu.)
Another "secret" is that eVent is just a laminate, just like GT is. It's the bonding to the facing materials and quality of construction which separates the various manufacturers using the same laminate structure. Also, if you want to use GT you must state "Gore-Tex" and pass their quality controls but if you use eVent then they (General Electric (GE), the owners of eVent) are more liberal, both about naming and quality. As an example, Mountain Hardware bonds the eVent laminate themselves and calls it "Dry-Q Elite" without having to say "made with eVent" or anything like that.
Lastly, saying "eVent is better than GT" is hard to qualify because of the different processes, facing and "real world" applications in the field. You can measure the laminate head-to-head, but once it's bonded and in a piece of clothing you really need to compare them on a company-by-company or piece-by-piece basis.
I have a MH DQ.E as well as a Kuiu Yukon with DerzimaxNX. While the MH is a few years old the Yukon is new so I haven't done much testing with it yet but both fabrics have been phenomenal. I usually snow-ski in a light long-sleeve merino, a light vest and the MH jacket and it's been great.
Head to head, the fit and finish on both are excellent. The Yukon wins for noise, comfort, larger hood, and stretch. My particular MH has a snow-skirt though, which is great for killing drafts, and was cheaper, but doesn't fit a ski-helmet (or my climbing helmet.)
In terms of breathability I'd put them about the same and the wind will rip right through either one. (Yes, even the DerzimaxNX-based Yukon ... and while it's a monolithic membrane which isn't supposed to pass wind ... it sure feels like it.
If you're exerting it's great. If you're static then it's good to have another layer available.
I'm sitting here in a climate-controlled office (my watch has been sitting on the desk and says it's about 75F with a cotton t-shirt and a light hoodie on under the Yukon (zipped up to my collarbone) and I am comfortable. There's almost zero insulation to the Yukon (huge plus) and with any other sweatshirt/softshell/jacket I'd be uncomfortable/overheating for sure.
Yesterday at about 55deg in a drizzle I had a t-shirt, a light polartec vest, a medium-heavy weight polar-fleece pullover and the Yukon on while going up and down a ladder cleaning out the gutters on a friend's house. I did start to overheat but, really, that's way too many layers to start with. Had to test it though! =)
Best part about the DerzimaxNX ... it will not wet out. Period.
Kuiu's Yukon set cost me a lot of money but it's beautiful high-end gear (easily on par with my Arc'teryx) with proven tech and, thus far, it's performed as expected. We'll see how it holds up once I put a pack on but, unlike "hole-y stuff" (GT, eVent, NeoShell) the Yukon shouldn't soak through.
-mox
