A double-felled outseam to "replace" a lack of cosmetic selvedge detailing? How does that make any sense? Do you need an arbitrary number of persnickety #menswear boxes checked for the product to pass muster?
Also, the Taylor Stitch chinos and cords look like they have regular outseams to me. It looks like the chore pants do have a double-felled outseam, but that doesn't seem to be what Gustin is going for with these chinos.