General note from an apparel designer who works in the non-hunting outdoor world:
If you're cross-shopping waterproof shells, focus more on the details of the membrane (most important), laminate construction, face fabric, and lining, rather than the brand that sells the final cut-and-sewn product. Particularly if two pieces use the same membrane.
The laminate (face + membrane + lining) is the primary determining factor for overall performance, but most apparel brands are picking from the same set of laminate options from 3rd parties like Gore-Tex, Dermizax, eVent, Pertex, etc. It's rare for an apparel brand to get exclusive rights to a certain 3rd-party fabric and membrane combination (especially from big materials brands like Gore-Tex).
E.g., I would expect to get extremely similar levels of water resistance, breathability, and durability from the Sitka Delta Pro Wading Jacket and Arc'teryx Rush, since they both use the same Gore Pro membrane, and their face fabrics appear to be extremely similar on paper.
Obviously, brands and products differ in terms of fit, feature sets, warranty, price, etc. And some brands (looking at you, Sitka) do a terrible job of sharing the finer details of the materials they use.
But, having tested a ton of apparel from a ton of different brands, the cut-and-sew quality tends to be pretty consistent when comparing pieces of similar price points. This is likely due to most of them being made with the same machines, techniques, and/or in the same factories.
I've had excellent experiences with most Arc'teryx shells over the years. I still consider them one of the best technical apparel brands in the world, and their warranty has historically been excellent. But I wouldn't say any of their shells proved to be notably more/less water resistant, breathable, or durable than pieces from other brands that utilized very similar or identical laminates.
Apologies for the tangent, but hopefully someone finds it useful.