Gardein Breakfast Patties[1][2] retail for $3 at my grocery store and regularly have $1-off in-store coupons. Even the macros are solid. Everything else I've tried from Gardein has been excellent as well, and this is far from the best stuff out there.
I wish I had an answer for you, I'm really honestly not too educated on the subject. I just know that there are more expensive and better reviewed meat-replacements out there than what I've personally bought in the store. That being said, Gardein is no slouch. I've also been to The Herbivorous Butcher in Minneapolis and Twin Cities Veg Fest and the quality of meat-replacements (and cheese-replacements) at both those places were on a whole other level.